public IEnumerable <IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters,
params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
}
var typedParameters = parameters as ApproximateParameters;
var x = arguments.First();
if (arguments.All(i => i.IsConstant()))
{
return(new [] { milpManager.FromConstant(typedParameters.Function(x.ConstantValue.Value)) });
}
var one = milpManager.FromConstant(1);
var points = typedParameters.Arguments.Select(a => Tuple.Create(milpManager.FromConstant(a), milpManager.FromConstant(typedParameters.Function(a)))).ToArray();
var variables = points.Select(p => milpManager.CreateAnonymous(typedParameters.ArgumentMustBeOnAGrid ? Domain.BinaryInteger : Domain.PositiveOrZeroReal).Set(ConstraintType.LessOrEqual, one)).ToArray();
x.Set(ConstraintType.Equal, milpManager.Operation(OperationType.Addition, points.Select((point, index) => variables[index].Operation(OperationType.Multiplication, point.Item1)).ToArray()));
var y = milpManager.Operation(OperationType.Addition, points.Select((point, index) => variables[index].Operation(OperationType.Multiplication, point.Item2)).ToArray());
milpManager.Operation(OperationType.Addition, variables).Set(ConstraintType.Equal, one);
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, variables.First(), variables.Skip(1).ToArray());
y.ConstantValue = x.IsConstant() ? typedParameters.Function(x.ConstantValue.Value) : (double?)null;
y.Expression = $"approximation({typedParameters.FunctionDescription})";
return(new[] { y });
}
public IVariable Set(IMilpManager milpManager, ConstraintType type, IVariable leftVariable,
IVariable rightVariable)
{
switch (type)
{
case ConstraintType.Equal:
milpManager.SetEqual(leftVariable, rightVariable);
leftVariable.ConstantValue = rightVariable.ConstantValue ?? leftVariable.ConstantValue;
rightVariable.ConstantValue = leftVariable.ConstantValue ?? rightVariable.ConstantValue;
break;
case ConstraintType.LessOrEqual:
milpManager.SetLessOrEqual(leftVariable, rightVariable);
break;
case ConstraintType.GreaterOrEqual:
milpManager.SetGreaterOrEqual(leftVariable, rightVariable);
break;
case ConstraintType.LessThan:
milpManager.Operation(OperationType.IsLessThan, leftVariable, rightVariable)
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
break;
case ConstraintType.GreaterThan:
milpManager.Operation(OperationType.IsGreaterThan, leftVariable, rightVariable)
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
break;
case ConstraintType.NotEqual:
milpManager.Operation(OperationType.IsNotEqual, leftVariable, rightVariable)
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
break;
default:
throw new InvalidOperationException("Cannot set constraint");
}
return leftVariable;
}
public IEnumerable<IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters, params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
var typedParameters = parameters as NthElementsParameters;
if (arguments.All(a => a.IsConstant()) && typedParameters.Indexes.All(a => a.IsConstant()))
{
var sorted = arguments.OrderBy(a => a.ConstantValue.Value).ToArray();
return typedParameters.Indexes.Select(i => sorted[(int)i.ConstantValue.Value]);
}
var variables = new List<IVariable>();
var sums = arguments.Select(a => Tuple.Create(a, milpManager.Operation(OperationType.Addition,
arguments.Where(b => a != b).Select(b => a.Operation(OperationType.IsGreaterOrEqual, b).Create()).ToArray()).Create())).ToArray();
var huge = milpManager.FromConstant(milpManager.MaximumIntegerValue);
foreach(var indexVariable in typedParameters.Indexes)
{
var result = huge;
foreach (var sum in sums)
{
result = result.Operation(OperationType.Minimum, milpManager.Operation(OperationType.Condition,
sum.Item2.Operation(OperationType.IsGreaterOrEqual, indexVariable),
sum.Item1,
huge
));
}
var singleVariable = result.Create();
singleVariable.Expression = $"nthElement(index: {indexVariable.FullExpression()}, {string.Join(",", arguments.Select(a => a.FullExpression()).ToArray())})";
variables.Add(singleVariable);
}
return variables;
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
var constantResult = Math.Pow(arguments[0].ConstantValue.Value, arguments[1].ConstantValue.Value);
if (arguments.All(a => a.IsInteger()))
{
return(milpManager.FromConstant((int)constantResult));
}
else
{
return(milpManager.FromConstant(constantResult));
}
}
var number = arguments[0];
var power = arguments[1];
var one = milpManager.FromConstant(1);
var zero = milpManager.FromConstant(0);
var isNumberLessOrEqualOne = number.Operation(OperationType.IsLessOrEqual, one);
var isPowerZero = power.Operation(OperationType.IsLessOrEqual, zero);
var isPowerOne = power.Operation(OperationType.IsEqual, one);
var isEdgeCase = milpManager.Operation(OperationType.Disjunction, isNumberLessOrEqualOne, isPowerZero, isPowerOne);
var result = milpManager.Operation(
OperationType.Condition,
isPowerZero,
one,
milpManager.Operation(
OperationType.Condition,
isNumberLessOrEqualOne,
number,
milpManager.Operation(
OperationType.Condition,
isPowerOne,
number,
CalculatePower(number, power, milpManager, isEdgeCase)
)
)
);
result.ConstantValue = number.ConstantValue.HasValue && power.ConstantValue.HasValue
? number.ConstantValue == 0
? 0.0
: power.ConstantValue == 0
? number.ConstantValue
: Math.Pow(number.ConstantValue.Value, power.ConstantValue.Value)
: (double?)null;
result.Expression = $"{number.FullExpression()} ** {power.FullExpression()}";
return(result);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(a => a.IsConstant()))
{
var constantResult = Math.Pow(arguments[0].ConstantValue.Value, arguments[1].ConstantValue.Value);
if (arguments.All(a => a.IsInteger()))
{
return milpManager.FromConstant((int) constantResult);
}
else
{
return milpManager.FromConstant(constantResult);
}
}
var number = arguments[0];
var power = arguments[1];
var one = milpManager.FromConstant(1);
var zero = milpManager.FromConstant(0);
var isNumberLessOrEqualOne = number.Operation(OperationType.IsLessOrEqual, one);
var isPowerZero = power.Operation(OperationType.IsLessOrEqual, zero);
var isPowerOne = power.Operation(OperationType.IsEqual, one);
var isEdgeCase = milpManager.Operation(OperationType.Disjunction, isNumberLessOrEqualOne, isPowerZero, isPowerOne);
var result = milpManager.Operation(
OperationType.Condition,
isPowerZero,
one,
milpManager.Operation(
OperationType.Condition,
isNumberLessOrEqualOne,
number,
milpManager.Operation(
OperationType.Condition,
isPowerOne,
number,
CalculatePower(number, power, milpManager, isEdgeCase)
)
)
);
result.ConstantValue = number.ConstantValue.HasValue && power.ConstantValue.HasValue
? number.ConstantValue == 0
? 0.0
: power.ConstantValue == 0
? number.ConstantValue
: Math.Pow(number.ConstantValue.Value, power.ConstantValue.Value)
: (double?) null;
result.Expression = $"{number.FullExpression()} ** {power.FullExpression()}";
return result;
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(a => a.IsConstant()))
{
return milpManager.FromConstant(arguments.Select(a => (int)a.ConstantValue).Aggregate((a, b) => (a + b) % 2));
}
var variable = arguments.Aggregate((a,b) =>
milpManager.Operation(OperationType.Disjunction,
milpManager.Operation(OperationType.Conjunction, a.Operation(OperationType.BinaryNegation), b),
milpManager.Operation(OperationType.Conjunction, a, b.Operation(OperationType.BinaryNegation))));
variable.Expression = $"{string.Join(" ^ ", arguments.Select(a => a.FullExpression()).ToArray())}";
return variable;
}
private static IEnumerable <IVariable> CalculateForVariable(IMilpManager milpManager, IVariable[] arguments, uint decompositionBase)
{
List <Tuple <IVariable, int> > variables =
Enumerable.Range(0, GetDigitsCount(milpManager, decompositionBase))
.Select(i =>
{
var baseRaised = (int)Math.Pow(decompositionBase, i);
var variable = milpManager.CreateAnonymous(decompositionBase == 2 ? Domain.BinaryInteger : Domain.PositiveOrZeroInteger);
if (decompositionBase > 2)
{
variable = variable.Set(ConstraintType.LessOrEqual, milpManager.FromConstant((int)decompositionBase - 1));
}
return(Tuple.Create(variable, baseRaised));
})
.ToList();
milpManager.Operation(OperationType.Addition,
variables.Select(v => v.Item1.Operation(OperationType.Multiplication, milpManager.FromConstant(v.Item2)))
.ToArray()).Set(ConstraintType.Equal, arguments[0]);
return(variables.Select((v, index) => {
var result = v.Item1;
result.Expression = $"decomposition(digit: {index}, base: {decompositionBase}, {arguments[0].FullExpression()})";
return result;
}));
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
var constantArgument = (int)arguments[0].ConstantValue.Value;
var constantResult = constantArgument == 0 ? 1 : Enumerable.Range(1, constantArgument).Aggregate((a, b) => a * b);
return(milpManager.FromConstant(constantResult));
}
var number = arguments[0];
var one = milpManager.FromConstant(1);
var result = one;
for (int i = SoundBoundary(milpManager.MaximumIntegerValue); i >= 0; --i)
{
result = result.Operation(OperationType.Multiplication,
milpManager.Operation(OperationType.Maximum, one,
number.Operation(OperationType.Subtraction, milpManager.FromConstant(i))));
}
var finalResult = result.ChangeDomain(Domain.PositiveOrZeroInteger);
finalResult.Expression = $"{number.FullExpression()}!";
return(finalResult);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments[0].IsConstant())
{
if (arguments[0].ConstantValue.Value <= milpManager.Epsilon)
{
return(arguments[2]);
}
return(arguments[1]);
}
var trueBranch = arguments[0].Operation(OperationType.Multiplication, arguments[1]);
var falseBranch = arguments[0].Operation(OperationType.BinaryNegation)
.Operation(OperationType.Multiplication, arguments[2]);
var result = milpManager.Create(milpManager.Operation(OperationType.Addition,
trueBranch,
falseBranch
).ChangeDomain(trueBranch.LowestEncompassingDomain(falseBranch)));
result.Expression = $"{arguments[0].FullExpression()} ? {arguments[1].FullExpression()} : {arguments[2].FullExpression()}";
result.ConstantValue = !arguments[0].ConstantValue.HasValue
? null
: (int)arguments[0].ConstantValue.Value == 1 ? trueBranch.ConstantValue : falseBranch.ConstantValue;
return(result);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if(!SupportsOperation(type,arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(x => x.IsConstant()))
{
if (arguments[0].IsInteger())
{
return milpManager.FromConstant(Math.Abs((int)arguments[0].ConstantValue.Value));
}
return milpManager.FromConstant(Math.Abs(arguments[0].ConstantValue.Value));
}
var number = arguments[0];
var numberNegated = number.Operation(OperationType.Negation);
var result = milpManager.CreateAnonymous(number.IsInteger() ? Domain.PositiveOrZeroInteger : Domain.PositiveOrZeroReal);
result.Set(ConstraintType.GreaterOrEqual, number)
.Set(ConstraintType.GreaterOrEqual, numberNegated);
milpManager.Operation(OperationType.Addition,
result.Operation(OperationType.IsEqual, number),
result.Operation(OperationType.IsEqual, numberNegated))
.Set(ConstraintType.GreaterOrEqual, milpManager.FromConstant(1));
result.ConstantValue = number.ConstantValue.HasValue ? Math.Abs(number.ConstantValue.Value) : number.ConstantValue;
result.Expression = $"|{number.FullExpression()}|";
return result;
}
private static IEnumerable<IVariable> CalculateForVariable(IMilpManager milpManager, IVariable[] arguments, uint decompositionBase)
{
List<Tuple<IVariable, int>> variables =
Enumerable.Range(0, GetDigitsCount(milpManager, decompositionBase))
.Select(i =>
{
var baseRaised = (int)Math.Pow(decompositionBase, i);
var variable = milpManager.CreateAnonymous(decompositionBase == 2 ? Domain.BinaryInteger : Domain.PositiveOrZeroInteger);
if (decompositionBase > 2)
{
variable = variable.Set(ConstraintType.LessOrEqual,milpManager.FromConstant((int) decompositionBase - 1));
}
return Tuple.Create(variable, baseRaised);
})
.ToList();
milpManager.Operation(OperationType.Addition,
variables.Select(v => v.Item1.Operation(OperationType.Multiplication, milpManager.FromConstant(v.Item2)))
.ToArray()).Set(ConstraintType.Equal, arguments[0]);
return variables.Select((v, index) => {
var result = v.Item1;
result.Expression = $"decomposition(digit: {index}, base: {decompositionBase}, {arguments[0].FullExpression()})";
return result;
});
}
public IEnumerable <IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters,
params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
}
var index = ((ArraySetParameters)parameters).Index;
var value = ((ArraySetParameters)parameters).Value;
if (index.IsConstant())
{
arguments[(int)index.ConstantValue.Value] = value;
return(arguments);
}
var catenatedArguments = string.Join(", ", arguments.Select(a => a.FullExpression()).ToArray());
for (int i = 0; i < arguments.Length; ++i)
{
arguments[i] = milpManager.Operation(OperationType.Condition, milpManager.FromConstant(i).Operation(OperationType.IsEqual, index), value, arguments[i]);
arguments[i].Expression = $"arraySet(wantedIndex: {index.FullExpression()}, value: {value.FullExpression()}, inArrayIndex: {i}, {catenatedArguments})";
}
return(arguments);
}
public IVariable Set(IMilpManager milpManager, CompositeConstraintType type, ICompositeConstraintParameters parameters,
IVariable leftVariable, params IVariable[] rightVariable)
{
var maximumIntegerValue = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var one = milpManager.FromConstant(1);
var allVariables = new[] { leftVariable }.Concat(rightVariable).ToArray();
var boundaryVariables = allVariables.Select(v => milpManager.CreateAnonymous(Domain.BinaryInteger)).ToArray();
milpManager.Operation(OperationType.Addition, boundaryVariables).Set(ConstraintType.LessOrEqual, one);
for (int i = 0; i < allVariables.Length; ++i)
{
IVariable sum = boundaryVariables[i];
if (i < allVariables.Length - 1)
{
sum = sum.Operation(OperationType.Addition, boundaryVariables[i + 1]);
}
allVariables[i]
.Set(ConstraintType.LessOrEqual, sum.Operation(OperationType.Multiplication, maximumIntegerValue))
.Set(ConstraintType.GreaterOrEqual, sum.Operation(OperationType.Multiplication, maximumIntegerValue).Operation(OperationType.Negation));
}
return(leftVariable);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(x => x.IsConstant()))
{
if (arguments[0].IsInteger())
{
return(milpManager.FromConstant(Math.Abs((int)arguments[0].ConstantValue.Value)));
}
return(milpManager.FromConstant(Math.Abs(arguments[0].ConstantValue.Value)));
}
var number = arguments[0];
var numberNegated = number.Operation(OperationType.Negation);
var result = milpManager.CreateAnonymous(number.IsInteger() ? Domain.PositiveOrZeroInteger : Domain.PositiveOrZeroReal);
result.Set(ConstraintType.GreaterOrEqual, number)
.Set(ConstraintType.GreaterOrEqual, numberNegated);
milpManager.Operation(OperationType.Addition,
result.Operation(OperationType.IsEqual, number),
result.Operation(OperationType.IsEqual, numberNegated))
.Set(ConstraintType.GreaterOrEqual, milpManager.FromConstant(1));
result.ConstantValue = number.ConstantValue.HasValue ? Math.Abs(number.ConstantValue.Value) : number.ConstantValue;
result.Expression = $"|{number.FullExpression()}|";
return(result);
}
public IEnumerable <IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters, params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(arguments.OrderBy(a => a.ConstantValue.Value));
}
var castedParameters = parameters as CountingSortParameters;
var values = castedParameters.Values;
var valuesWithCounts = new Dictionary <IVariable, IVariable>();
var zero = milpManager.FromConstant(0);
foreach (var value in values)
{
valuesWithCounts[value] = arguments.Aggregate(zero,
(current, val) =>
current.Operation(OperationType.Addition, val.Operation(OperationType.IsEqual, value)));
}
var sum = zero;
foreach (var value in values)
{
sum = sum.Operation(OperationType.Addition, valuesWithCounts[value]);
valuesWithCounts[value] = sum;
}
var infinity = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var results = Enumerable.Range(1, arguments.Length).Select(p =>
{
var position = milpManager.FromConstant(p);
var result = milpManager.Operation(OperationType.Minimum,
values.Select(value =>
milpManager.Operation(OperationType.Condition,
position.Operation(OperationType.IsLessOrEqual, valuesWithCounts[value]), value, infinity)
).ToArray());
result.Expression = $"countingSort(position: {p}, {string.Join(", ", arguments.Select(a => a.FullExpression()).ToArray())})";
return(result);
}).ToArray();
return(results);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.Length > 2)
{
return arguments[0].Operation(type, milpManager.Operation(type, arguments.Skip(1).ToArray()));
}
return CalculateForTwoVariables(milpManager, type, arguments);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(milpManager.FromConstant(arguments.Select(a => (int)a.ConstantValue).Aggregate((a, b) => (a + b) % 2)));
}
var variable = arguments.Aggregate((a, b) =>
milpManager.Operation(OperationType.Disjunction,
milpManager.Operation(OperationType.Conjunction, a.Operation(OperationType.BinaryNegation), b),
milpManager.Operation(OperationType.Conjunction, a, b.Operation(OperationType.BinaryNegation))));
variable.Expression = $"{string.Join(" ^ ", arguments.Select(a => a.FullExpression()).ToArray())}";
return(variable);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.Length > 2)
{
return(arguments[0].Operation(type, milpManager.Operation(type, arguments.Skip(1).ToArray())));
}
return(CalculateForTwoVariables(milpManager, type, arguments));
}
public IEnumerable<IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters, params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
if (arguments.All(a => a.IsConstant()))
{
return arguments.OrderBy(a => a.ConstantValue.Value);
}
var castedParameters = parameters as CountingSortParameters;
var values = castedParameters.Values;
var valuesWithCounts = new Dictionary<IVariable, IVariable>();
var zero = milpManager.FromConstant(0);
foreach (var value in values)
{
valuesWithCounts[value] = arguments.Aggregate(zero,
(current, val) =>
current.Operation(OperationType.Addition, val.Operation(OperationType.IsEqual, value)));
}
var sum = zero;
foreach (var value in values)
{
sum = sum.Operation(OperationType.Addition, valuesWithCounts[value]);
valuesWithCounts[value] = sum;
}
var infinity = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var results = Enumerable.Range(1, arguments.Length).Select(p =>
{
var position = milpManager.FromConstant(p);
var result = milpManager.Operation(OperationType.Minimum,
values.Select(value =>
milpManager.Operation(OperationType.Condition,
position.Operation(OperationType.IsLessOrEqual, valuesWithCounts[value]), value, infinity)
).ToArray());
result.Expression = $"countingSort(position: {p}, {string.Join(", ", arguments.Select(a => a.FullExpression()).ToArray())})";
return result;
}).ToArray();
return results;
}
public IVariable Set(IMilpManager milpManager, ConstraintType type, IVariable leftVariable,
IVariable rightVariable)
{
switch (type)
{
case ConstraintType.Equal:
milpManager.SetEqual(leftVariable, rightVariable);
leftVariable.ConstantValue = rightVariable.ConstantValue ?? leftVariable.ConstantValue;
rightVariable.ConstantValue = leftVariable.ConstantValue ?? rightVariable.ConstantValue;
break;
case ConstraintType.LessOrEqual:
milpManager.SetLessOrEqual(leftVariable, rightVariable);
break;
case ConstraintType.GreaterOrEqual:
milpManager.SetGreaterOrEqual(leftVariable, rightVariable);
break;
case ConstraintType.LessThan:
milpManager.Operation(OperationType.IsLessThan, leftVariable, rightVariable)
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
break;
case ConstraintType.GreaterThan:
milpManager.Operation(OperationType.IsGreaterThan, leftVariable, rightVariable)
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
break;
case ConstraintType.NotEqual:
milpManager.Operation(OperationType.IsNotEqual, leftVariable, rightVariable)
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
break;
default:
throw new InvalidOperationException("Cannot set constraint");
}
return(leftVariable);
}
public IVariable Calculate(IMilpManager milpManager, GoalType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(milpManager.Operation(OperationType.Minimum, arguments));
}
return(milpManager.MakeGoal(GoalType.MaximizeMaximum, arguments).MakeGoal(GoalType.Minimize));
}
public IEnumerable <IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters, params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
}
var typedParameters = parameters as NthElementsParameters;
if (arguments.All(a => a.IsConstant()) && typedParameters.Indexes.All(a => a.IsConstant()))
{
var sorted = arguments.OrderBy(a => a.ConstantValue.Value).ToArray();
return(typedParameters.Indexes.Select(i => sorted[(int)i.ConstantValue.Value]));
}
var variables = new List <IVariable>();
var sums = arguments.Select(a => Tuple.Create(a, milpManager.Operation(OperationType.Addition,
arguments.Where(b => a != b).Select(b => a.Operation(OperationType.IsGreaterOrEqual, b).Create()).ToArray()).Create())).ToArray();
var huge = milpManager.FromConstant(milpManager.MaximumIntegerValue);
foreach (var indexVariable in typedParameters.Indexes)
{
var result = huge;
foreach (var sum in sums)
{
result = result.Operation(OperationType.Minimum, milpManager.Operation(OperationType.Condition,
sum.Item2.Operation(OperationType.IsGreaterOrEqual, indexVariable),
sum.Item1,
huge
));
}
var singleVariable = result.Create();
singleVariable.Expression = $"nthElement(index: {indexVariable.FullExpression()}, {string.Join(",", arguments.Select(a => a.FullExpression()).ToArray())})";
variables.Add(singleVariable);
}
return(variables);
}
public IVariable Calculate(IMilpManager milpManager, GoalType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(a => a.IsConstant()))
{
return milpManager.Operation(OperationType.Maximum, arguments);
}
var result = milpManager.CreateAnonymous(arguments.Any(a => a.IsReal()) ? Domain.AnyReal : Domain.AnyInteger);
arguments.Aggregate(milpManager.FromConstant(0),(existing, next) => existing.Operation(OperationType.Disjunction, result.Operation(OperationType.IsEqual, next)))
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
return result;
}
private IVariable MultiplyIntegers(IMilpManager baseMilpManager, Domain domain, IVariable[] arguments)
{
var binaries = arguments.Where(a => a.IsBinary()).ToArray();
var nonBinaries = arguments.Where(a => !a.IsBinary()).ToArray();
if (binaries.Any())
{
IVariable conjucted = baseMilpManager.Operation(OperationType.Multiplication, binaries);
return(MultipleByBinaryDigit(baseMilpManager, nonBinaries[0], conjucted).ChangeDomain(domain)
.Operation(OperationType.Multiplication, nonBinaries.Skip(1).ToArray()));
}
return(MultiplyNonBinaryIntegers(baseMilpManager, nonBinaries, domain));
}
private static IVariable CalculatePower(IVariable number, IVariable power, IMilpManager milpManager, IVariable isEdgeCase)
{
var digits = (int)Math.Ceiling(Math.Log(milpManager.IntegerWidth, 2.0));
var infinity = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var currentPower = milpManager.Operation(OperationType.Minimum, number, isEdgeCase.Operation(OperationType.BinaryNegation).Operation(OperationType.Multiplication, infinity));
var decomposition = power.CompositeOperation(CompositeOperationType.UnsignedMagnitudeDecomposition).Take(digits).ToArray();
var one = milpManager.FromConstant(1);
var result = one;
for (int i = 0; i < digits; ++i)
{
if (i > 0)
{
var isAnyNonzeroDigitLater = milpManager.Operation(OperationType.Disjunction, decomposition.Skip(i).ToArray());
var numberToMultiply = milpManager.Operation(OperationType.Minimum, currentPower, isAnyNonzeroDigitLater.Operation(OperationType.Multiplication, infinity));
currentPower = numberToMultiply.Operation(OperationType.Multiplication, numberToMultiply);
}
result = result.Operation(OperationType.Multiplication, one.Operation(OperationType.Maximum, currentPower.Operation(OperationType.Multiplication, decomposition[i])));
}
return(result);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(a => a.IsConstant()))
{
return milpManager.FromConstant(arguments[0].ConstantValue.Value < arguments[1].ConstantValue.Value ? 1 : 0);
}
var result = milpManager.Operation(OperationType.IsGreaterThan, arguments[1], arguments[0]);
result.ConstantValue = arguments.All(a => a.ConstantValue.HasValue)
? arguments[0].ConstantValue < arguments[1].ConstantValue ? 1 : 0
: (double?)null;
result.Expression = $"{arguments[0].FullExpression()} ?< {arguments[1].FullExpression()}";
return result;
}
private static IVariable CalculatePower(IVariable number, IVariable power, IMilpManager milpManager, IVariable isEdgeCase)
{
var digits = (int)Math.Ceiling(Math.Log(milpManager.IntegerWidth, 2.0));
var infinity = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var currentPower = milpManager.Operation(OperationType.Minimum, number, isEdgeCase.Operation(OperationType.BinaryNegation).Operation(OperationType.Multiplication, infinity));
var decomposition = power.CompositeOperation(CompositeOperationType.UnsignedMagnitudeDecomposition).Take(digits).ToArray();
var one = milpManager.FromConstant(1);
var result = one;
for (int i = 0; i < digits; ++i)
{
if (i > 0)
{
var isAnyNonzeroDigitLater = milpManager.Operation(OperationType.Disjunction, decomposition.Skip(i).ToArray());
var numberToMultiply = milpManager.Operation(OperationType.Minimum, currentPower, isAnyNonzeroDigitLater.Operation(OperationType.Multiplication, infinity));
currentPower = numberToMultiply.Operation(OperationType.Multiplication, numberToMultiply);
}
result = result.Operation(OperationType.Multiplication, one.Operation(OperationType.Maximum, currentPower.Operation(OperationType.Multiplication, decomposition[i])));
}
return result;
}
public IVariable Calculate(IMilpManager milpManager, GoalType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(a => a.IsConstant()))
{
return milpManager.Operation(OperationType.Minimum, arguments);
}
var result = milpManager.CreateAnonymous(arguments.Any(a => a.IsReal()) ? Domain.AnyReal : Domain.AnyInteger);
foreach (var argument in arguments)
{
result.Set(ConstraintType.LessOrEqual, argument);
}
return result;
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.Length == 1)
{
return(arguments[0]);
}
if (MultiplyOnlyConstants(arguments))
{
var result = arguments.Select(a => a.ConstantValue.Value).Aggregate((a, b) => a * b);
if (arguments.All(a => a.IsInteger()))
{
return(milpManager.FromConstant((int)result));
}
else
{
return(milpManager.FromConstant(result));
}
}
var domain = CalculateDomain(arguments);
if (MultiplyAtMostOneNonconstant(arguments))
{
return(arguments.Aggregate((x, y) =>
{
var result = y.IsConstant()
? milpManager.MultiplyVariableByConstant(x, y, domain)
: milpManager.MultiplyVariableByConstant(y, x, domain);
result.ConstantValue = x.ConstantValue * y.ConstantValue;
result.Expression = $"{x.FullExpression()} * {y.FullExpression()}";
return result;
}));
}
if (MultiplyBinaryVariables(arguments))
{
return(milpManager.Operation(OperationType.Conjunction, arguments));
}
return(MultiplyIntegers(milpManager, domain, arguments));
}
public IVariable Set(IMilpManager milpManager, CompositeConstraintType type, ICompositeConstraintParameters parameters,
IVariable leftVariable, params IVariable[] rightVariable)
{
var one = milpManager.FromConstant(1);
var maximumIntegerValue = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var allVariables = new[] {leftVariable}.Concat(rightVariable).ToArray();
var boundaryVariables = allVariables.Select(v => milpManager.CreateAnonymous(Domain.BinaryInteger)).ToArray();
milpManager.Operation(OperationType.Addition, boundaryVariables).Set(ConstraintType.LessOrEqual, one);
foreach (var pair in allVariables.Zip(boundaryVariables, Tuple.Create))
{
pair.Item1
.Set(ConstraintType.LessOrEqual, pair.Item2.Operation(OperationType.Multiplication, maximumIntegerValue))
.Set(ConstraintType.GreaterOrEqual, pair.Item2.Operation(OperationType.Multiplication, maximumIntegerValue).Operation(OperationType.Negation));
}
return leftVariable;
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(milpManager.FromConstant(arguments[0].ConstantValue.Value < arguments[1].ConstantValue.Value ? 1 : 0));
}
var result = milpManager.Operation(OperationType.IsGreaterThan, arguments[1], arguments[0]);
result.ConstantValue = arguments.All(a => a.ConstantValue.HasValue)
? arguments[0].ConstantValue < arguments[1].ConstantValue ? 1 : 0
: (double?)null;
result.Expression = $"{arguments[0].FullExpression()} ?< {arguments[1].FullExpression()}";
return(result);
}
public IVariable Calculate(IMilpManager milpManager, GoalType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(milpManager.Operation(OperationType.Maximum, arguments));
}
var result = milpManager.CreateAnonymous(arguments.Any(a => a.IsReal()) ? Domain.AnyReal : Domain.AnyInteger);
arguments.Aggregate(milpManager.FromConstant(0), (existing, next) => existing.Operation(OperationType.Disjunction, result.Operation(OperationType.IsEqual, next)))
.Set(ConstraintType.Equal, milpManager.FromConstant(1));
return(result);
}
public IEnumerable <IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters,
params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
}
var options = parameters as LoopParameters;
var totalBound = milpManager.CreateAnonymous(Domain.PositiveOrZeroInteger);
totalBound.Set(ConstraintType.LessOrEqual, milpManager.FromConstant(options.MaxIterations));
options.BeforeLoopAction(totalBound, arguments);
for (int i = 1; i <= options.MaxIterations; ++i)
{
var counter = milpManager.FromConstant(i);
var isLooping = counter.Operation(OperationType.IsLessOrEqual, totalBound);
options.BeforeIterationAction(counter, isLooping, totalBound, arguments);
for (int v = 0; v < arguments.Length; ++v)
{
if (options.BeforeBody.Length > v)
{
options.BeforeBody[v](arguments[v], counter, isLooping, totalBound, arguments);
}
arguments[v] = milpManager.Operation(OperationType.Condition, isLooping, options.Body[v](arguments[v], counter, isLooping, totalBound, arguments), arguments[v]);
if (options.AfterBody.Length > v)
{
options.AfterBody[v](arguments[v], counter, isLooping, totalBound, arguments);
}
}
options.AfterIterationAction(counter, isLooping, totalBound, arguments);
}
options.AfterLoopAction(totalBound, arguments);
return(arguments.Concat(new[] { totalBound }).ToArray());
}
public IVariable Set(IMilpManager milpManager, CompositeConstraintType type, ICompositeConstraintParameters parameters,
IVariable leftVariable, params IVariable[] rightVariable)
{
var one = milpManager.FromConstant(1);
var maximumIntegerValue = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var allVariables = new[] { leftVariable }.Concat(rightVariable).ToArray();
var boundaryVariables = allVariables.Select(v => milpManager.CreateAnonymous(Domain.BinaryInteger)).ToArray();
milpManager.Operation(OperationType.Addition, boundaryVariables).Set(ConstraintType.LessOrEqual, one);
foreach (var pair in allVariables.Zip(boundaryVariables, Tuple.Create))
{
pair.Item1
.Set(ConstraintType.LessOrEqual, pair.Item2.Operation(OperationType.Multiplication, maximumIntegerValue))
.Set(ConstraintType.GreaterOrEqual, pair.Item2.Operation(OperationType.Multiplication, maximumIntegerValue).Operation(OperationType.Negation));
}
return(leftVariable);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.Length == 1)
{
return arguments[0];
}
if (MultiplyOnlyConstants(arguments))
{
var result = arguments.Select(a => a.ConstantValue.Value).Aggregate((a, b) => a*b);
if (arguments.All(a => a.IsInteger()))
{
return milpManager.FromConstant((int) result);
}
else
{
return milpManager.FromConstant(result);
}
}
var domain = CalculateDomain(arguments);
if (MultiplyAtMostOneNonconstant(arguments))
{
return arguments.Aggregate((x, y) =>
{
var result = y.IsConstant()
? milpManager.MultiplyVariableByConstant(x, y, domain)
: milpManager.MultiplyVariableByConstant(y, x, domain);
result.ConstantValue = x.ConstantValue*y.ConstantValue;
result.Expression = $"{x.FullExpression()} * {y.FullExpression()}";
return result;
});
}
if (MultiplyBinaryVariables(arguments))
{
return milpManager.Operation(OperationType.Conjunction, arguments);
}
return MultiplyIntegers(milpManager, domain, arguments);
}
private IVariable MultipleByBinaryDigit(IMilpManager baseMilpManager, IVariable number, IVariable digit)
{
if (number.Domain == Domain.AnyConstantInteger || number.Domain == Domain.AnyInteger)
{
var absoluteNumber = number.Operation(OperationType.AbsoluteValue);
var result = MultipleByBinaryDigit(baseMilpManager, absoluteNumber, digit);
var two = baseMilpManager.FromConstant(2);
return(MultipleByBinaryDigit(baseMilpManager, result, number.Operation(OperationType.IsGreaterOrEqual, baseMilpManager.FromConstant(0)))
.Operation(OperationType.Subtraction,
result.Operation(OperationType.Division, two))
.Operation(OperationType.Multiplication, two));
}
IVariable digitMultipliedByInfinity = digit.Operation(OperationType.Multiplication, baseMilpManager.FromConstant(baseMilpManager.MaximumIntegerValue));
return(baseMilpManager.Operation(OperationType.Minimum,
number,
digitMultipliedByInfinity
));
}
public IVariable Calculate(IMilpManager milpManager, GoalType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(milpManager.Operation(OperationType.Minimum, arguments));
}
var result = milpManager.CreateAnonymous(arguments.Any(a => a.IsReal()) ? Domain.AnyReal : Domain.AnyInteger);
foreach (var argument in arguments)
{
result.Set(ConstraintType.LessOrEqual, argument);
}
return(result);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
}
if (arguments.All(a => a.IsConstant()))
{
return(milpManager.FromConstant(arguments.Select(a => (int)a.ConstantValue).Aggregate(Math.Min)));
}
var variable = milpManager.CreateAnonymous(Domain.BinaryInteger);
var sum = milpManager.Operation(OperationType.Addition, arguments);
var argumentsCount = arguments.Length;
sum.Operation(OperationType.Subtraction,
milpManager.FromConstant(argumentsCount).Operation(OperationType.Multiplication, variable))
.Set(ConstraintType.LessOrEqual, milpManager.FromConstant(argumentsCount - 1))
.Set(ConstraintType.GreaterOrEqual, milpManager.FromConstant(0));
variable.ConstantValue = arguments.Aggregate((double?)1.0, (a, b) => a.HasValue && b.ConstantValue.HasValue ? Math.Min(a.Value, b.ConstantValue.Value) : (double?)null);
variable.Expression = $"{string.Join(" && ", arguments.Select(a => a.FullExpression()).ToArray())}";
return(variable);
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments.All(a => a.IsConstant()))
{
var constantArgument = (int) arguments[0].ConstantValue.Value;
var constantResult = constantArgument == 0 ? 1 : Enumerable.Range(1, constantArgument).Aggregate((a, b) => a*b);
return milpManager.FromConstant(constantResult);
}
var number = arguments[0];
var one = milpManager.FromConstant(1);
var result = one;
for (int i = SoundBoundary(milpManager.MaximumIntegerValue); i >= 0; --i)
{
result = result.Operation(OperationType.Multiplication,
milpManager.Operation(OperationType.Maximum, one,
number.Operation(OperationType.Subtraction, milpManager.FromConstant(i))));
}
var finalResult = result.ChangeDomain(Domain.PositiveOrZeroInteger);
finalResult.Expression = $"{number.FullExpression()}!";
return finalResult;
}
public IVariable Set(IMilpManager milpManager, CompositeConstraintType type, ICompositeConstraintParameters parameters,
IVariable leftVariable, params IVariable[] rightVariable)
{
var maximumIntegerValue = milpManager.FromConstant(milpManager.MaximumIntegerValue);
var one = milpManager.FromConstant(1);
var allVariables = new[] { leftVariable }.Concat(rightVariable).ToArray();
var boundaryVariables = allVariables.Select(v => milpManager.CreateAnonymous(Domain.BinaryInteger)).ToArray();
milpManager.Operation(OperationType.Addition, boundaryVariables).Set(ConstraintType.LessOrEqual, one);
for (int i = 0; i < allVariables.Length; ++i)
{
IVariable sum = boundaryVariables[i];
if (i < allVariables.Length - 1)
{
sum = sum.Operation(OperationType.Addition, boundaryVariables[i + 1]);
}
allVariables[i]
.Set(ConstraintType.LessOrEqual, sum.Operation(OperationType.Multiplication, maximumIntegerValue))
.Set(ConstraintType.GreaterOrEqual, sum.Operation(OperationType.Multiplication, maximumIntegerValue).Operation(OperationType.Negation));
}
return leftVariable;
}
public IVariable Calculate(IMilpManager milpManager, OperationType type, params IVariable[] arguments)
{
if (!SupportsOperation(type, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, arguments));
if (arguments[0].IsConstant())
{
if (arguments[0].ConstantValue.Value <= milpManager.Epsilon)
{
return arguments[2];
}
return arguments[1];
}
var trueBranch = arguments[0].Operation(OperationType.Multiplication, arguments[1]);
var falseBranch = arguments[0].Operation(OperationType.BinaryNegation)
.Operation(OperationType.Multiplication, arguments[2]);
var result = milpManager.Create(milpManager.Operation(OperationType.Addition,
trueBranch,
falseBranch
).ChangeDomain(trueBranch.LowestEncompassingDomain(falseBranch)));
result.Expression = $"{arguments[0].FullExpression()} ? {arguments[1].FullExpression()} : {arguments[2].FullExpression()}";
result.ConstantValue = !arguments[0].ConstantValue.HasValue
? null
: (int) arguments[0].ConstantValue.Value == 1 ? trueBranch.ConstantValue : falseBranch.ConstantValue;
return result;
}
private IVariable MultiplyIntegers(IMilpManager baseMilpManager, Domain domain, IVariable[] arguments)
{
var binaries = arguments.Where(a => a.IsBinary()).ToArray();
var nonBinaries = arguments.Where(a => !a.IsBinary()).ToArray();
if (binaries.Any())
{
IVariable conjucted = baseMilpManager.Operation(OperationType.Multiplication, binaries);
return MultipleByBinaryDigit(baseMilpManager, nonBinaries[0], conjucted).ChangeDomain(domain)
.Operation(OperationType.Multiplication, nonBinaries.Skip(1).ToArray());
}
return MultiplyNonBinaryIntegers(baseMilpManager, nonBinaries, domain);
}
private IVariable MultipleByBinaryDigit(IMilpManager baseMilpManager, IVariable number, IVariable digit)
{
if (number.Domain == Domain.AnyConstantInteger || number.Domain == Domain.AnyInteger)
{
var absoluteNumber = number.Operation(OperationType.AbsoluteValue);
var result = MultipleByBinaryDigit(baseMilpManager, absoluteNumber, digit);
var two = baseMilpManager.FromConstant(2);
return MultipleByBinaryDigit(baseMilpManager, result, number.Operation(OperationType.IsGreaterOrEqual, baseMilpManager.FromConstant(0)))
.Operation(OperationType.Subtraction,
result.Operation(OperationType.Division, two))
.Operation(OperationType.Multiplication, two);
}
IVariable digitMultipliedByInfinity = digit.Operation(OperationType.Multiplication, baseMilpManager.FromConstant(baseMilpManager.MaximumIntegerValue));
return baseMilpManager.Operation(OperationType.Minimum,
number,
digitMultipliedByInfinity
);
}
public IEnumerable <IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters,
params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments))
{
throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
}
var typedParameters = parameters as Approximate2DParameters;
var x = arguments.First();
var y = arguments.Skip(1).First();
if (arguments.All(i => i.IsConstant()))
{
return(new[] { milpManager.FromConstant(typedParameters.Function(x.ConstantValue.Value, y.ConstantValue.Value)) });
}
var one = milpManager.FromConstant(1);
var variables =
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Select(p =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(q =>
milpManager.CreateAnonymous(typedParameters.ArgumentMustBeOnAGrid
? Domain.BinaryInteger
: Domain.PositiveOrZeroReal).Set(ConstraintType.LessOrEqual, one)).ToArray())
.ToArray();
x.Set(ConstraintType.Equal, milpManager.Operation(OperationType.Addition,
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).SelectMany(indexX =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY =>
variables[indexX][indexY].Operation(OperationType.Multiplication, milpManager.FromConstant(typedParameters.ArgumentsX.ElementAt(indexX))))).ToArray()
));
y.Set(ConstraintType.Equal, milpManager.Operation(OperationType.Addition,
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).SelectMany(indexX =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY =>
variables[indexX][indexY].Operation(OperationType.Multiplication, milpManager.FromConstant(typedParameters.ArgumentsY.ElementAt(indexY))))).ToArray()
));
var z = milpManager.Operation(OperationType.Addition,
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).SelectMany(indexX =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY =>
variables[indexX][indexY].Operation(OperationType.Multiplication, milpManager.FromConstant(typedParameters.Function(typedParameters.ArgumentsX.ElementAt(indexX), typedParameters.ArgumentsY.ElementAt(indexY)))))).ToArray()
);
milpManager.Operation(OperationType.Addition, variables.SelectMany(v => v).ToArray()).Set(ConstraintType.Equal, one);
var xSet = Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Select(indexX => milpManager.Operation(OperationType.Addition, Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY => variables[indexX][indexY]).ToArray())).ToArray();
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, xSet.First(), xSet.Skip(1).ToArray());
var ySet = Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY => milpManager.Operation(OperationType.Addition, Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Select(indexX => variables[indexX][indexY]).ToArray())).ToArray();
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, ySet.First(), ySet.Skip(1).ToArray());
if (!typedParameters.ArgumentMustBeOnAGrid)
{
var triangleSet = Enumerable.Range(0, typedParameters.ArgumentsY.Count()).SelectMany(indexY =>
{
var variablesToSet = Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Where(indexX => indexX + indexY < variables[indexX].Length).Select(indexX => variables[indexX][indexX + indexY]).ToArray();
if (variablesToSet.Any())
{
return(new[] { milpManager.Operation(OperationType.Addition, variablesToSet) });
}
return(new IVariable[0]);
}).ToArray();
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, triangleSet.First(), triangleSet.Skip(1).ToArray());
}
z.ConstantValue = x.IsConstant() && y.IsConstant() ? typedParameters.Function(x.ConstantValue.Value, y.ConstantValue.Value) : (double?)null;
z.Expression = $"approximation2D({typedParameters.FunctionDescription})";
return(new[] { z });
}
public IEnumerable<IVariable> Calculate(IMilpManager milpManager, CompositeOperationType type, ICompositeOperationParameters parameters,
params IVariable[] arguments)
{
if (!SupportsOperation(type, parameters, arguments)) throw new NotSupportedException(SolverUtilities.FormatUnsupportedMessage(type, parameters, arguments));
var typedParameters = parameters as Approximate2DParameters;
var x = arguments.First();
var y = arguments.Skip(1).First();
if (arguments.All(i => i.IsConstant()))
{
return new[] { milpManager.FromConstant(typedParameters.Function(x.ConstantValue.Value, y.ConstantValue.Value)) };
}
var one = milpManager.FromConstant(1);
var variables =
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Select(p =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(q =>
milpManager.CreateAnonymous(typedParameters.ArgumentMustBeOnAGrid
? Domain.BinaryInteger
: Domain.PositiveOrZeroReal).Set(ConstraintType.LessOrEqual, one)).ToArray())
.ToArray();
x.Set(ConstraintType.Equal, milpManager.Operation(OperationType.Addition,
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).SelectMany(indexX =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY =>
variables[indexX][indexY].Operation(OperationType.Multiplication, milpManager.FromConstant(typedParameters.ArgumentsX.ElementAt(indexX))))).ToArray()
));
y.Set(ConstraintType.Equal, milpManager.Operation(OperationType.Addition,
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).SelectMany(indexX =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY =>
variables[indexX][indexY].Operation(OperationType.Multiplication, milpManager.FromConstant(typedParameters.ArgumentsY.ElementAt(indexY))))).ToArray()
));
var z = milpManager.Operation(OperationType.Addition,
Enumerable.Range(0, typedParameters.ArgumentsX.Count()).SelectMany(indexX =>
Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY =>
variables[indexX][indexY].Operation(OperationType.Multiplication, milpManager.FromConstant(typedParameters.Function(typedParameters.ArgumentsX.ElementAt(indexX), typedParameters.ArgumentsY.ElementAt(indexY)))))).ToArray()
);
milpManager.Operation(OperationType.Addition, variables.SelectMany(v => v).ToArray()).Set(ConstraintType.Equal, one);
var xSet = Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Select(indexX => milpManager.Operation(OperationType.Addition, Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY => variables[indexX][indexY]).ToArray())).ToArray();
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, xSet.First(), xSet.Skip(1).ToArray());
var ySet = Enumerable.Range(0, typedParameters.ArgumentsY.Count()).Select(indexY => milpManager.Operation(OperationType.Addition, Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Select(indexX => variables[indexX][indexY]).ToArray())).ToArray();
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, ySet.First(), ySet.Skip(1).ToArray());
if (!typedParameters.ArgumentMustBeOnAGrid)
{
var triangleSet = Enumerable.Range(0, typedParameters.ArgumentsY.Count()).SelectMany(indexY =>
{
var variablesToSet = Enumerable.Range(0, typedParameters.ArgumentsX.Count()).Where(indexX => indexX + indexY < variables[indexX].Length).Select(indexX => variables[indexX][indexX + indexY]).ToArray();
if (variablesToSet.Any())
{
return new[] {milpManager.Operation(OperationType.Addition, variablesToSet)};
}
return new IVariable[0];
}).ToArray();
milpManager.Set(CompositeConstraintType.SpecialOrderedSetType2, triangleSet.First(), triangleSet.Skip(1).ToArray());
}
z.ConstantValue = x.IsConstant() && y.IsConstant() ? typedParameters.Function(x.ConstantValue.Value, y.ConstantValue.Value) : (double?)null;
z.Expression = $"approximation2D({typedParameters.FunctionDescription})";
return new[] { z };
}