[Help-glpk] Multi-ranged column bounds

[Ariel Daliot]

Hello all,

 

I am trying to solve a problem using glpk 4.42.

I need the continuously valued columns to upper and lower bounds but also to be able to have a single integer value out of this bound.

More specifically, I need all the columns Xi to be bounded by 6=< Xi =<16 but I also want Xi=0 to be a possible value for the variables.  

This is how I set the range:

 

                    glp_set_col_kind(lp, Xi, GLP_CV);

                    glp_set_col_bnds(lp, Xi, GLP_DB, 6.0, 16.0);

 

but how can I add Xi=0 to the allowed range?

 

Thanks in advance,

Ariel