Julian Hall
This bug and others are exposed by the simpler model [offset.lp.txt](https://github.com/ERGO-Code/HiGHS/files/9537223/offset.lp.txt) and emphasised by the printing added to https://github.com/ERGO-Code/HiGHS/tree/fix-948 @svigerske : You've done much more than I have with the...
Just want to check that what's changed hasn't broken anything
Baby steps in adding `1-opt` heuristic to enhance the MIP solver. Calls to `HighsMipSolverData::addIncumbent` are now more transparent due to hard-coded `char` values being passed via the opaque parameter `source`....
Started adding trivial heuristics to the end of `HighsMipSolverData::runSetup()`
When repeated calls are made to HiGHS with (for example) changes in costs and/or bounds, HiGHS will re-use the factorization of the basis matrix from the previous call. When all...
For the following very simple QP, the solver gets into an infinite loop > #include "Highs.h" int main() { HighsModel model; HighsLp& lp = model.lp_; HighsHessian& hessian = model.hessian_; lp.num_col_...
### Discussed in https://github.com/ERGO-Code/HiGHS/discussions/1568 Originally posted by **lpierezan** January 9, 2024 Hello everyone. I'm running the solver through the highspy (v 1.5.3) interface providing a MIP model in mps format....
Highs 1.6.0 for [issue-1510.lp](https://github.com/ERGO-Code/HiGHS/files/13363508/issue-1510.lp.txt) yields an objective value of - 21 (correct) with presolve - 20 _without_ presolve New issue spawned by #1284
Transferred from #1164 since incorrect infeasibility in the model that originally prompted the issue has been fixed by #1513 However, [issue-1517.lp](https://github.com/ERGO-Code/HiGHS/files/13383877/issue-1517.lp.zip) (aka model_198.lp) is still declared as being infeasible, incorrectly,...