Hi,
If I call glp_simplex without specifying that any variables be integers and then call glp_intop it looks like it at least makes the objective function an integer.
If I specify the variable should be integers as well via glp_set_col_kind with GLP_IV then I found the time to solve the problem was much larger (well to be expected I guess).
What is the process I should follow if I want to perform a real relaxation of a full integer problem and only go to integers if the problem is not satisfiable (mostly what I use the calls for)?
I couldnât really see this spelled out in the docs.
I use the object function to find redundant constraints and I can see this with both real and integer objectives. Obviously doing the real case first would be faster. Likewise I determine feasibility of a system of inequalities with a zero objective and want to do this in both reals and then integers.
Thanks.
Neill.