public override StateFormula existentialNormalForm()
{
// AG phi = NOT EG (NOT phi)
StateFormula e_operand = operand.existentialNormalForm();
StateFormula not_phi = new SNot(e_operand);
StateFormula exists_always = new SEAlways(not_phi);
return(new SNot(exists_always));
}
public override StateFormula existentialNormalForm()
{
// A(p U w) = NOT E(NOT w U (NOT p AND NOT w)) AND NOT EG NOT w
StateFormula not_right1 = new SNot(right);
StateFormula not_right2 = new SNot(right);
StateFormula not_right3 = new SNot(right);
StateFormula not_left = new SNot(left);
StateFormula inner_and = new SAnd(not_left, not_right2);
StateFormula exists_until = new SEUntil(not_right1, inner_and);
StateFormula not_exists_left = new SNot(exists_until);
StateFormula exists_always = new SEAlways(not_right3);
StateFormula not_exists_right = new SNot(exists_always);
StateFormula outer_and = new SAnd(not_exists_left, not_exists_right);
return(outer_and.existentialNormalForm());
}