I will appriciate any help to the following statement for gams:
Vg(t,i) =g=0;
Vd(t,i) =l=0;
If Vg(t,i) >0 then Vd(t,i) =0 else Vd(t,i)<0
and
If Vd(t,i)<0 then Vg(t,i)=0 else Vg(t,i)>0
Thanks in advanced. 