Hi guys,

Sat i have two set A = {1,2}, P = {1,2,3}, are the two formulations below equivalent:

$\displaystyle

x_{ap} \leq 1 \quad \forall a \in A, \forall p \in P

$

and

$\displaystyle

x_{ap} \leq 1 \quad \forall ap \in (A \times P)

$

I am not sure if i can distinguish.

Thanks