[Help-glpk] Re: Set cardinality

[Andrew Makhorin]

>1. does MathProg have a set function like "card",  that will give me
> the number of elements in a set? 

The card function is not implemented yet. However you can compute the
cardinality of a set as follows:

   sum{set} 1

>2. what's "eps" meaning in "Marginal" column? 

This means that although corresponding variable is non-basic, its
reduced cost is close to zero, i.e. the problem is dual degenerative.