public void Test4()
{
ObjectVariableTerm x = new ObjectVariable('x');
IndividualConstantTerm <RationalNumber> half =
(IndividualConstant <RationalNumber>)(new RationalNumber(1, 2));
IndividualConstantTerm <RationalNumber>
one = (IndividualConstant <RationalNumber>)(new RationalNumber(1, 1));
var pr1 = new PredicateFormula(Predicates.More, x, half);
var pr2 = new PredicateFormula(Predicates.Less, x, one);
var f1 = new PropositionalConnectiveFormula(Conjunction.GetInstance(), pr1, pr2);
var f2 = new QuantifierFormula(ExistentialQuantifier.GetInstance(), x, f1);
IndividualConstantTerm <int> two = new IndividualConstant <int>(2);
var xSqr = new FunctionTerm(Functions.Pow, x, two);
var pr3 = new PredicateFormula(Predicates.MoreZero, xSqr);
var pr4 = new PredicateFormula(Predicates.EqualZero, x);
var f3 = new PropositionalConnectiveFormula(Disjunction.GetInstance(), pr3, pr4);
var f = new PropositionalConnectiveFormula(Conjunction.GetInstance(), f2, f3);
var actual = SimpleTarskiAlgorithm.QuantifiersElimination(f);
Formula expected = f3;
Formula expected1 = new PropositionalConnectiveFormula(Disjunction.GetInstance(), pr4, pr3);
Assert.IsTrue(expected.Equals(actual) || expected1.Equals(actual));
}
private static void CheckOrder(Symbol left, Symbol right)
{
var err = left switch
{
Comma _ => (right is Comma),
ArithmeticBinaryFunction _ => (right is ArithmeticBinaryFunction),
ArithmeticPredicate _ => (right is ArithmeticPredicate),
ObjectVariable _ => (right is ObjectVariable),
IndividualConstant <BigInteger> _ => (right is IndividualConstant <BigInteger>),
Quantifier _ => (right is Quantifier),
BinaryPropositionalConnective _ => (right is BinaryPropositionalConnective),
_ => false
};
if (err)
{
throw new ArgumentException($"symbols {left} and {right} cannot be placed side by side");
}
}
public IndividualConstantTerm(IndividualConstant <T> individualConstant)
{
IndividualConstant = individualConstant;
}