Ole Kröger
Ole Kröger
Currently if almost locally solved integer solutions aren't allowed but almost locally solved is one restart is done to maybe obtain a good solved integer solution. This restart should probably...
Add quadratic constraints in the Feasibility Pump if supported by the mip solver i.e Gurobi **Attention:** only convex quadratics are supported
Such that the user can - save new incumbents (or integral solutions in general) - add his own heuristics on a new thread maybe to add a new incumbent -...
I think the current problem with too many cores is, that some only solve unreasonable nodes (nodes which have bad bounds and would be cut away anyway later). Therefore I...
If both children from the root node seem to be infeasible it is reasonable to restart to avoid global infeasibility. This is definitely reasonable in cases where the fpump found...
At the moment strong branching doesn't do that much for some bigger instances as our time limit of 100s is quite strict (well it doesn't seem to improve if increased)....
If several processors are used it is reasonable to have one processor for the feasibility pump whereas the other processors can start the BB already.
Idea: http://www.ms.unimelb.edu.au/~moshe@unimelb/620-362/gomory/