
From:  Heinrich Schuchardt 
Subject:  Re: [Helpglpk] Conditional MultiIteration Statement 
Date:  Thu, 24 Nov 2016 23:49:23 +0100 
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Dear all,
I am a newbie in GLPK Modeling, and I got I solver statements like this:
1 s.t. a{i in 1..n}: Sum{j in 1..n} x[i,j] <=1; #0 or 1
2 s.t. b{i in 1..n}: Sum{j in 1..n} y[i,j] <=n;#0 to n
these works fine, but I want to add a third stament restricting the sum of y[i,j] to be zero only if the sum of x[i,j] is one
something like that
1 s.t. c{i in 1..n}: if Sum{j in 1..n} x[i,j] ==1 then Sum{j in 1..n} y[i,j] ==0 ;#sum y[] is 0 if sum x[] is one
can anyone helps me here?
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