Re: [Help-glpk] pick element from set?

[Kevin Hunter]

At 1:42am -0400 Mon, 02 Jul 2012, Glpk Xypron wrote:
> there is no function that will return an element of a set (except for
> one-dimensional numeric sets).
>
> You can create subsets.

> set X, dimen 2 := {(5, 7), (1, 10), (23, -3), ("y", "x"), ("a", "abc")};
> set S := setof{(i,j) in X : forall{(k,l) in X} i <=k && j <= l} (i,j);

It is so very helpful to be answered in context of my question.  Thank 
you!  I have been doing a variant of this, but again, your's is much 
cleaner.  Thank you for the snippet.

Kevin