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- Feel free to add more packages, links, notes. But please do not duplicate information - Please free to add more packages, links, notes to `Meta-ticket #31164 <https://github.com/sagemath/sage/issues/31164>`_, which tracks the task of adding packages to Sage so that they appear in the spkg section of the Sage reference manual.

- Please do not duplicate information
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  `spkg section of the Sage reference manual <https://doc.sagemath.org/html/en/reference/spkg/>`_.   `spkg section of the Sage reference manual <https://doc.sagemath.org/html/en/reference/spkg/>`_ (which is automatically generated from `SAGE_ROOT/build/pkgs/ <https://github.com/sagemath/sage/tree/develop/build/pkgs>`_)
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---------------
New-style SPKGs
---------------

The single authoritative source for the packages integrated in the Sage distribution (SPKGs) is
the `SAGE_ROOT/build/pkgs/ <https://git.sagemath.org/sage.git/tree/build/pkgs>`_ directory.
Each SPKG is represented by a subdirectory. The structure
of these subdirectories is explained in
the `Developer's Guide <https://doc.sagemath.org/html/en/developer/packaging.html>`_.

Since Sage 9.2, the `spkg section of the Sage reference manual <https://doc.sagemath.org/html/en/reference/spkg/>`_ is automatically generated from the information in ``SAGE_ROOT/build/pkgs/``. (`Trac #29655 <https://trac.sagemath.org/ticket/29655>`_ improves the formatting of this information.)

Use the following shell commands below to access the information from the `SAGE_ROOT/build/pkgs`
directory of your copy of Sage:

 * Standard packages: ``./sage -standard``
 * Installed packages: ``./sage -installed``
 * Optional packages available: ``./sage -optional``
 * Experimental packages available: ``./sage -experimental``
 * Details about an SPKG: ``./sage -info <SPKG>``

For some advanced package tools, use ``./sage -package``

-------------------------
List of external packages
-------------------------

These packages are not (yet?) integrated in the SageMath distribution
as SPKGs and have to be installed separately.

See also https://github.com/slel/external-packages
for another collection

`Modular Abelian Varieties <https://github.com/williamstein/sage_modabvar>`_
-----------------------------------------------------------------------------

  by William Stein and Hao Chen

  Links:

  - https://github.com/williamstein/sage_modabvar
  - https://github.com/haochenuw/sage_modabvar

`Python implementation of chebfun <https://github.com/cswiercz/pychebfun>`_
---------------------------------------------------------------------------

  by Chris Swierczewski

`Purple Sage <https://github.com/williamstein/psage>`_
------------------------------------------------------

  by William Stein

  A Library of Number Theory Code that depends on Sage.

`Sébastien Labbé's research code <http://www.slabbe.org/blogue/categorie/slabbe-spkg/>`_
----------------------------------------------------------------------------------------

  by Sébastien Labbé

  See also this
  `blog post <http://www.slabbe.org/blogue/2014/08/releasing-slabbe-my-own-sage-package/>`_


`CHA <https://bitbucket.org/nborie/cha>`_
-----------------------------------------

  by Nicolas Borie

  A Sage Library of Combinatorial Hopf algebras.

`Sage-semigroups <https://github.com/nthiery/sage-semigroups/>`_
----------------------------------------------------------------

  by Nicolas M. Thiéry

  A semigroup (representation) theory library for SageMath.

  (very preliminary!!!)

`Automata and semigroups <https://paperman.name/soft/>`_
-------------------------------------------------------------------------------------------------

  by Charles Paperman

`ss-isogeny-software <https://github.com/defeo/ss-isogeny-software>`_
---------------------------------------------------------------------

  by Luca De Feo

  keywords: isogeny elliptic curve cryptography quantum

`Abel Functions <https://github.com/abelfunctions/abelfunctions>`_
------------------------------------------------------------------

  by Chris Swierczewski

  Discussion at
  https://groups.google.com/d/msg/sage-devel/29ndCD8z94k/K6H2OK5TAgAJ

`Schottky uniformization <https://github.com/jupsal/SchottkyUniformizationSageComputations>`_
---------------------------------------------------------------------------------------------

  by Jeremy Upsal

  Various ideas from Schottky uniformization are implemented in Sage.
  These now include the SK prime function and will later include the
  Riemann Theta function built from a RS via Schottky uniformization
  due to Darren Crowdy.

`surface-dynamics: flat surfaces <http://www.labri.fr/perso/vdelecro/flatsurf.html>`_
---------------------------------------------------------------------------------------

  by Vincent Delecroix and Samuel Lelièvre

`sage-flatsurf: flat surfaces <https://github.com/videlec/sage-flatsurf>`_
--------------------------------------------------------------------------

  by Vincent Delecroix and Pat Hooper

`Lyapunov exponents for multidimensional continued fractions <https://github.com/seblabbe/lecf>`_
-------------------------------------------------------------------------------------------------

  by Vincent Delecroix and Sébastien Labbé

  Links:

  - https://github.com/videlec/lecf
  - https://github.com/seblabbe/lecf

`Sage train track <https://github.com/coulbois/sage-train-track>`_
------------------------------------------------------------------

  by Thierry Coulbois

 * does not work on latest versions of SageMath, see https://github.com/coulbois/sage-train-track/pull/15

`Flagmatic <https://github.com/emil79/flagmatic>`_
--------------------------------------------------

  by Emil R. Vaughan

  (it is a subject of a GSoC 2016 project to `port it to Sage 7.4 <https://github.com/jsliacan/flagmatic>`_)

`Chow <http://www.math.sciences.univ-nantes.fr/~sorger/chow_en.html>`_
----------------------------------------------------------------------

  by Christoph Sorger and Manfred Lehn

  A Sage library for computations in intersection theory.

`Carleman linearization of polynomial differential equations <https://github.com/mforets/carlin>`_
--------------------------------------------------------------------------------------------------

  by Marcelo Forets

`ore_algebra <https://github.com/mkauers/ore_algebra>`_
-------------------------------------------------------

  by Manuel Kauers et al.

  A Sage implementation of Ore algebras and Ore polynomials.

`ecfactory <https://github.com/scipr-lab/ecfactory>`_
-------------------------------------------------------

  by http://www.scipr-lab.org/

  The library implements algorithms to construct elliptic curves with certain desired properties.

`cryptosage <https://github.com/sara62/cryptosage>`_
-------------------------------------------------------

  by Sara Forouhar

  CryptoSage provides cryptography algorithms in SageMath.

`cutgeneratingfunctionology <https://github.com/mkoeppe/cutgeneratingfunctionology>`_ (formerly infinite-group-relaxation-sage-code)
------------------------------------------------------------------------------------------------------------------------------------

  by Matthias Köppe, Yuan Zhou, C. Y. Hong, and Jiawei Wang

  Python code for computation and experimentation with cut-generating functions, in particular the Gomory-Johnson model

`multipolynomial-bases <https://github.com/VivianePons/multipolynomial-bases>`_
--------------------------------------------------------------------------------------

  by Viviane Pons

  A Sage package to work on multipolynomials bases (Schubert, Grothendieck, Key).

`Zeta <http://www.maths.nuigalway.ie/~rossmann/Zeta/>`_
-------------------------------------------------------

  by Tobias Rossmann

  Zeta provides methods for computing local and topological zeta functions arising from the enumeration of subalgebras, ideals, submodules,
  representations, and conjugacy classes of suitable algebraic structures, as well as some other types of zeta functions.

`Igusa and topological zeta <https://jviusos.github.io/sage.html>`_
--------------------------------------------------------------------

  by Juan Viu-Sos

  Calculation Of The (Local) Igusa And Topological Zeta Functions Of A
  Non-Degenerated Polynomial With Respect To His Newton'S Polyhedron.

`admcycles <https://gitlab.com/jo314schmitt/admcycles>`_
----------------------------------------------------------

  by Johannes Schmitt et alii

  admcycles is a SageMath module to compute with the tautological ring of the moduli spaces of complex curves.

`conrey-dirichlet-characters <https://github.com/jwbober/conrey-dirichlet-characters>`_
----------------------------------------------------------------------------------------

  by Jonathan Bober

  This contains some Sage/Cython code for working with Dirichlet characters using a numbering scheme described by Brian Conrey.

`MCLF <https://github.com/mclf/mclf>`_

  by Stefan Wewers, Julian Rüth

  A Sage toolbox for computing with Models of Curves over Local Fields.

`Usain Boltz <https://gitlab.com/ParComb/usain-boltz>`_
----------------------------------------------------------

  by Matthieu Dien and Martin Pépin

  Usain Boltz is a Python/Cython library meant to automate the random generation of tree-like structures.

`addcombq <https://github.com/Torrencem/addcombq>`_
-------------------------------------------------------

  by Matt Torrence

  This is a Sage package for fast Additive Combinatorics functions.

`sage-numerical-interactive-mip <https://github.com/mkoeppe/sage-numerical-interactive-mip>`_
---------------------------------------------------------------------------------------------

  by Peijun Xiao, Zeyi Wang, and Yuan Zhou

  Interactive mixed integer linear programming solver

`ResSing <https://trac.sagemath.org/ticket/28651>`_
---------------------------------------------------

  by Suchandan Pal

  This is a package for calculating regular models of curves.

`Yacop <https://github.com/cnassau/yacop-sage>`_
------------------------------------------------

  by Christian Nassau

  Sage package for Steenrod algebra cohomology.

`Torus Knots Counter <https://github.com/AngelGonzalezPrieto/TorusKnotsCounter>`_
---------------------------------------------------------------------------------

  by Ángel González-Prieto (Universidad Politécnica de Madrid) and Vicente Muñoz (Universidad de Málaga).

  SageMath script that computes the motive of the irreducible SL(r,k)-character variety of an (n,m)-torus knot

`fgb_sage <https://github.com/mwageringel/fgb_sage>`_
-----------------------------------------------------

  by Markus Wageringel

  Sage interface for computing Gröbner bases with FGb.

`guptri_py <https://github.com/mwageringel/guptri_py>`_
-------------------------------------------------------

  by Markus Wageringel

  Sage/NumPy interface for solving generalized eigenvalue problems of singular matrix pencils with GUPTRI.

`comb_walk <https://discretewalks.gitlabpages.inria.fr/comb_walks/docs/>`_
---------------------------------------------------------------------------

  by Frédéric Chyzak, Antonio Jiménez-Pastor, Pierre Lairez

  A unified interface for working with generating functions and related object to Walks in the Quarter Plane.


`StarProducts <https://bitbucket.org/bpym/starproducts/src/master/>`_
---------------------------------------------------------------------

  by Peter Banks and Brent Pym

  A package for symbolic calculations with Poisson brackets and Kontsevich's deformation quantization formula

`sage-drg <https://github.com/jaanos/sage-drg>`_
------------------------------------------------

  by Janos Vidali

  A package for checking the feasibility of distance-regular graph parameter sets.

`kerrgeodesic_gw <https://github.com/BlackHolePerturbationToolkit/kerrgeodesic_gw>`_
------------------------------------------------------------------------------------

  by Eric Gourgoulhon, Alexandre Le Tiec, Frédéric H. Vincent and Niels Warburton

  A pip-installable SageMath package for computing geodesics of the Kerr spacetime
  as well as gravitational waves from bodies orbiting a Kerr black hole
- See `Sage GitHub wiki: Mathematical software landscape <https://github.com/sagemath/sage/wiki/Mathematical-Software-Landscape>`_
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- `Packages on gitlab matching "sagemath" <https://gitlab.com/search?search=sagemath>`_
- `Packages on Google Code Archive with tag "SAGE" <https://code.google.com/archive/search?q=domain:code.google.com%20label:SAGE>`_
- `Packages on Bitbucket matching "sagemath" <https://bitbucket.org/repo/all?name=sagemath>`_

SageMath external packages

A list of external packages for SageMath (spkg, pip-installable packages, etc).

SageMathExternalPackages (last edited 2024-03-04 00:39:32 by mkoeppe)