Originally posted by: SystemAdmin

[leo said:]

Dear all,

I use the branch callback to prune the nodes. Choosing zero children for a node prunes that node.  I use the following procedures:

(1) Use CPXgetcallbacknodeintfeas, and [u]randomly[/u] choose one branching candidate;
(2) Use CPXbranchcallbackbranchbds to set the branching for two directions: up node and down nodes. For each direction, I set the the number of boud changes to 0.  Say.

   status = CPXbranchcallbackbranchbds (env, cbdata, wherefrom,
                                        objval, [u][color=red]0[/color][/u], &bestj, 'L', varbd,
                                        NULL, &seqnum1);

   status = CPXbranchcallbackbranchbds (env, cbdata, wherefrom,
                                        objval, [u][color=red]0[/color][/u], &bestj, 'U', varbd,
                                        NULL, &seqnum1);

Do you think that I am right? Thanks.


Leo
#CPLEXOptimizers
#DecisionOptimization