passagemath-latte-4ti2

============================================================================ passagemath: Lattice points in polyhedra with LattE integrale and 4ti2

passagemath <https://github.com/passagemath/passagemath>__ is open source mathematical software in Python, released under the GNU General Public Licence GPLv2+.

It is a fork of SageMath <https://www.sagemath.org/>__, which has been developed 2005-2025 under the motto “Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, and MATLAB”.

The passagemath fork was created in October 2024 with the following goals:

• providing modularized installation with pip, thus completing a major project started in 2020 in the Sage codebase <https://github.com/sagemath/sage/issues/29705>__,
• establishing first-class membership in the scientific Python ecosystem,
• giving clear attribution of upstream projects <https://groups.google.com/g/sage-devel/c/6HO1HEtL1Fs/m/G002rPGpAAAJ>__,
• providing independently usable Python interfaces to upstream libraries,
• providing platform portability and integration testing services <https://github.com/passagemath/passagemath/issues/704>__ to upstream projects,
• inviting collaborations with upstream projects,
• building a professional, respectful, inclusive community <https://groups.google.com/g/sage-devel/c/xBzaINHWwUQ>__,
• developing a port to Pyodide <https://pyodide.org/en/stable/>__ for serverless deployment with Javascript,
• developing a native Windows port.

Full documentation <https://doc.sagemath.org/html/en/index.html>__ is available online.

passagemath attempts to support all major Linux distributions and recent versions of macOS. Use on Windows currently requires the use of Windows Subsystem for Linux or virtualization.

Complete sets of binary wheels are provided on PyPI for Python versions 3.9.x-3.12.x. Python 3.13.x is also supported, but some third-party packages are still missing wheels, so compilation from source is triggered for those.

About this pip-installable distribution package

This pip-installable source distribution passagemath-latte-4ti2 provides an interface to LattE integrale <https://www.math.ucdavis.edu/~latte/>_ (for the problems of counting lattice points in and integration over convex polytopes) and 4ti2 <https://github.com/4ti2/4ti2>_ (for algebraic, geometric and combinatorial problems on linear spaces).

What is included

• Python interface to LattE integrale programs <https://doc.sagemath.org/html/en/reference/interfaces/sage/interfaces/latte.html#module-sage.interfaces.latte>_

• Python interface to 4ti2 programs <https://doc.sagemath.org/html/en/reference/interfaces/sage/interfaces/four_ti_2.html>_

• Raw access to all executables from Python using sage.features.latte <https://doc.sagemath.org/html/en/reference/spkg/sage/features/latte.html>_ and sage.features.four_ti_2 <https://doc.sagemath.org/html/en/reference/spkg/sage/features/four_ti_2.html>_

• The binary wheels published on PyPI include a prebuilt copy of LattE integrale and 4ti2.

Examples

Using LattE integrale and 4ti2 programs on the command line::

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-latte-4ti2" sage -sh -c 'ppi 5'
...
### This makes 47 PPI up to sign
### Writing data file ppi5.gra and matrix file ppi5.mat done.

Finding the installation location of a LattE integrale or 4ti2 program in Python::

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-latte-4ti2[test]" ipython

In [1]: from sage.features.latte import Latte_count

In [2]: Latte_count().absolute_filename()
Out[2]: '/Users/mkoeppe/.local/pipx/.cache/2dc147a5e4863b4/lib/python3.11/site-packages/sage_wheels/bin/count'

In [3]: from sage.features.four_ti_2 import FourTi2Executable

In [4]: FourTi2Executable('ppi').absolute_filename()
Out[2]: '/Users/mkoeppe/.local/pipx/.cache/2dc147a5e4863b4/lib/python3.11/site-packages/sage_wheels/bin/ppi'

Using the low-level Python interfaces::

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-latte-4ti2[test]" ipython

In [1]: from sage.interfaces.latte import count

In [2]: cdd_Hrep = 'H-representation\nbegin\n 6 4 rational\n 2 -1 0 0\n 2 0 -1 0\n 2 0 0 -1\n 2 1 0 0\n 2 0 0 1\n 2 0 1 0\nend\n'

In [3]: count(cdd_Hrep, cdd=True)
Out[3]: 125

Use with sage.geometry.polyhedron::

$ pipx run --pip-args="--prefer-binary" --spec "passagemath-latte-4ti2[test]" ipython

In [1]: from sage.all__sagemath_polyhedra import *

In [2]: P = Polyhedron(vertices=[[1,0,0], [0,0,1], [-1,1,1], [-1,2,0]])

In [3]: P.volume(measure='induced_lattice', engine='latte')
Out[3]: 3