Final class Gtime extends Quantity {
double
gtime;
static double
A(event e, int i){} //the annotation
of this quantity
//axioms
constraint
{
event e1,
e2;
int i,
j;
forall e1,
e2, i, j: GXI.A(e1, i) == GXI.A(e2, j) -> A(e1, i ) == A(e2, j);
forall e1,
e2, i, j : GXI.A(e1, i) < GXI.A(e2, j) -> A(e1, i ) <= A(e2, j);
}
}
i, j are implicitly universally quantified
1st “forall”: same
GXI, then same time
2nd “forall”:
smaller GXI, smaller or equal time