Why donâ€™t you use subsets for the first equation:
nna(n) /b,c,d/,
inna(n) /c,d/
same thing for the second one.
Renger
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Rajasekhar Kadambur
Sent: Dienstag, 9. September 2014 13:31
To: gamsworld@googlegroups.com
Subject: Re: how to use subsets in equations
thanks for your quick response,

if it is for one term its fine but i have a large set for ‘a’. could you explain how to handle those.

kindly look in to equation 2 and post your response
On Tuesday, September 9, 2014 4:03:27 PM UTC+5:30, Rajasekhar Kadambur wrote:
My problem requirement is as follows:
sets
n / a, b, c, d/
i(n) /a,b/
j(n) /c/
k(n) /d/ ;
Variables inv(i,n), F(i,n),y(n,j);
Equation eq1, eq2;
 eq1 is loop from b to d excluding a (condition?)
eq1(i,n)$()… inv(i,n) =e= inv(i,n1)  F(i,n1);
*in eq2, n1 is intersection of i and j and exclusion of k
 and n2 is usage of j and k intersection by excluding i
eq2(i,n1,n2)$()… y(n1,j) + y(n2,j) =l= 1;
It would be grateful, if some helps in bulding code for my requirement. thanks in advance.
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