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## Re: [Help-glpk] Constraint!

**From**: |
Andrew Makhorin |

**Subject**: |
Re: [Help-glpk] Constraint! |

**Date**: |
Tue, 18 Dec 2007 15:12:46 +0300 |

>* How I can write this constraint in MathProg/AMPL?,*
>* (Mathematical form)*
>* sum(j=1 to t) sum(i=1 to I) b_ik * x_ij <= sum(j=1 to t) s_kj,*
>* t = 1,2,...,J; k = 1,2,...,K).*
s.t. foo{t in 1..J, k in 1..K}:
sum{j in 1..t, i in 1..I} b[i,k] * x[i,j] <= sum{j in 1..t} s[k,j];
>* The problem is to change the index for the next constraint for to obtain*
>* the "joint constraints". I probe with "FOR", but this is not permitted*
>* for the constraint. *
What is "joint constraints" ?