How to write this constraint in GAMS Code? Topic is solved

[Gaucho]

Hi,

I have a very basic question as I am not an experienced User in GAMS, but I couldn't figure this one out.
Does anyone know, how to write this in GAMScode? My problem is to include the j<>i correctly.

Best regards

[Manassaldi]

Hi, I guess you have to define the set, subset and alias.

for example:

Code: Select all

sets
i /i1*i10/
v /v1*v10/
N0(i) /i1,i3,i4,i5/
;
alias(i,j);
eq(i,v)$N0(i).. sum(j$(N0(j) and ord(j) ne ord(i)),x(i,j,v)) =e= sum(j$(N0(j) and ord(j) ne ord(i)),x(j,i,v))

[Renger]

Hi
You could also use

Code: Select all

$(not sameas(i,j)) 

instead of

Code: Select all

$(ord(i) ne ord(j))

.
Cheers
Renger

[Gaucho]

I thank both of you for your quick and helpful answers!