papilo

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Correct way to handle dual solution when using from command line

6

What is the correct way to account for an available dual solution when manually solving the presolved instance? I'm writing a `.mps` file, calling `presolve`, and then solve the resulting...

sstroemer

Singleton Column wrong reduction/ constant computation

6

Using Papilo 2.2.0 with only col singleton enabled I got an issue when reducing this problem. It should be trivally reduced to 0 but instead it is trivially reduced to...

olivierjuan

Avoid out-of-bounds array access

2

This is my attempt at a fix for https://github.com/scipopt/papilo/issues/47. It avoids reading element 0 of an empty array. If that array should not be empty in the first place, then...

jamesjer

``` ===> Building for papilo-2.1.2 [ 9% 7/11] : && /usr/local/libexec/ccache/c++ -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -DNDEBUG -fstack-protector-strong binaries/CMakeFiles/duplicates.dir/__/src/duplicates.cpp.o -o bin/duplicates -Wl,-rpath,/usr/ports/math/papilo/work/.build:/usr/local/lib: libpapilo-core.so /usr/local/lib/libboost_iostreams.so /usr/local/lib/libboost_serialization.so /usr/local/lib/libboost_program_options.so /usr/local/lib/libboost_regex.so...

yurivict

Performance regression from Papilo 2.1 to Papilo 2.3

11

I recently performed some tests for Presolving on SCIP's master branch and observed a significant performance regression for Papilo from 2.1 to 2.3. In general, the Papilo plugin seems to...

rolfvdhulst

HighsInterface.hpp:97:13: error: ‘class HighsLp’ has no member named ‘a_index_’

1

The HighsInterface.hpp is calling outdated methods on the HighsLp model. There was a PR for this error back in 2022 but the error remains in both branches. https://github.com/scipopt/papilo/pull/22 Could this...

caelumspace

`-DBUILD_SHARED_LIBS=ON` does not build dynamic libs

1

How to build `libpapilo` as a dynamic lib? Standard `-DBUILD_SHARED_LIBS=ON` fails to have an effect, only static libs get built: ``` Port libpapilo @2.3.0_0+gfortran contains: /opt/local/include/papilo/CMakeConfig.hpp /opt/local/include/papilo/Config.hpp /opt/local/include/papilo/core/Components.hpp /opt/local/include/papilo/core/ConstraintMatrix.hpp /opt/local/include/papilo/core/MatrixBuffer.hpp...

barracuda156

Fix cppcheck performance passedByValue warnings

1

MaximSmolskiy

Cannot read mps with maximization problem

3

Hi and thanks for your great work in developing papilo! I have a problem with reading and reducing mps files where the problem is defined as a maximization. On the...

ktp-max

[QST] Applying a transaction

3

In ProblemUpdate::applyTransaction, if one of the reduction is rejected, the function returns rejected flag. However, some of the reductions would have already been applied. My question is that, if the...

rg20