public Min(Expression left, Expression right)
{
Symbol = "min";
Left = left;
Right = right;
_expr = 0.5 * (Left + Right - Sym.Abs(Left - Right));
EvalFunctional = (c) => Math.Min(Left.Eval(c), Right.Eval(c));
DiffFunctional = (c, var) =>
{
// var diffExpr = _expr.SymbolicDiff(var);
// return diffExpr.Eval(c);
// var u = Left.Diff(c, var);
// var v = Right.Diff(c, var);
if (Left.Eval(c) < Right.Eval(c))
{
return(Left.Diff(c, var));
}
else if (Left.Eval(c) > Right.Eval(c))
{
return(Right.Diff(c, var));
}
else
{
return(0.5 * (Left.Diff(c, var) + Right.Diff(c, var)));
}
};
}
public Max(Expression left, Expression right)
{
Symbol = "max";
Left = left;
Right = right;
_expr = 0.5 * (Left + Right + Sym.Abs(Left - Right));
EvalFunctional = (c) => Math.Max(Left.Eval(c), Right.Eval(c));
DiffFunctional = (c, var) =>
{
// var u = Left.Diff(c, var);
// var v = Right.Diff(c, var);
if (Left.Eval(c) > Right.Eval(c))
{
return(Left.Diff(c, var));
}
else if (Left.Eval(c) < Right.Eval(c))
{
return(Right.Diff(c, var));
}
else
{
return(0.5 * (Left.Diff(c, var) + Right.Diff(c, var)));
}
/* if (Left.Eval(c) > Right.Eval(c))
* return Left.Diff(c, var);
* else
* return Right.Diff(c, var);*/
};
}
