passagemath-lrslib 10.4.61

passagemath: Reverse search for vertex enumeration and convex hulls with lrslib

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About this pip-installable distribution package

This pip-installable distribution passagemath-lrslib provides an interface to lrslib by David Avis, an implementation of the reverse search algorithm for vertex enumeration and convex hull problems.

What is included

• Binary wheels on PyPI contain prebuilt copies of lrslib executables.

Examples

Using lrslib programs on the command line:

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-lrslib" sage -sh -c lrs
*lrs:lrslib v.7.1 2021.6.2(64bit,lrslong.h,hybrid arithmetic)

Finding the installation location of an lrslib program:

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-lrslib[test]" ipython

In [1]: from sage.features.lrs import LrsNash

In [2]: LrsNash().absolute_filename()
Out[2]: '/Users/mkoeppe/.local/pipx/.cache/db3f5a0e2996f81/lib/python3.11/site-packages/sage_wheels/bin/lrsnash'

Use with sage.game_theory:

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-lrslib[test]" ipython

In [1]: from sage.all__sagemath_lrslib import *

In [2]: A = matrix([[1, -1], [-1, 1]]); B = matrix([[-1, 1], [1, -1]])

In [3]: matching_pennies = NormalFormGame([A, B])

In [4]: matching_pennies.obtain_nash(algorithm='lrs')
Out[4]: [[(1/2, 1/2), (1/2, 1/2)]]