Matthias Köppe
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mkoeppe.bsky.social
Matthias Köppe
@mkoeppe.bsky.social
860 followers 410 following 420 posts
Professor, UC Davis #Mathematics. He/him. #DavisCA.
Made #SageMath pip-installable @passagemath.org.
https://github.com/mkoeppe #Python #OpenSource
#cutgeneratingfunctionology #optimization #orms
I block accounts to increase reading focus.
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Reposted by Matthias Köppe
passagemath.org
Just released: Version 10.6.35 of passagemath, the pip-installable modularized #SageMath fork, an #OpenSource general-purpose #Mathematics system in #Python.
This version adds a new package for two-stage euclidean real quadratic fields by X. Guitart and M. Masdeu.
github.com/passagemath/...
Release passagemath-10.6.35 · passagemath/passagemath
passagemath-modules updates The matrix() constructor, when supplied with keyword arguments row_keys=... and/or column_keys=..., creates morphisms of free modules instead of plain matrices. The cons...
github.com
November 13, 2025 at 9:27 PM
Reposted by Matthias Köppe
passagemath.org
PR #1789 is about free modules.
github.com/passagemath/...
#MathSky #SageMath
Improved handling of `matrix(row_keys=..., column_keys=...)` by mkoeppe · Pull Request #1789 · passagemath/passagemath
Using the matrix constructor for making morphisms of free modules now supports more cases, in particular: sage: M = matrix(QQ, entries=7, row_keys=[1, 2, 3]); M Generic endomorphism of Free module ...
github.com
November 13, 2025 at 3:19 AM
Reposted by Matthias Köppe
passagemath.org
Just released: Version 10.6.34 of passagemath, the pip-installable modularized #SageMath fork, an #OpenSource general-purpose #Mathematics system in #Python.
This version adds support for reactive @marimo.io notebooks as an alternative to @jupyter.org notebooks.
github.com/passagemath/...
Release passagemath-10.6.34 · passagemath/passagemath
Support for reactive marimo notebooks The command for launching notebooks (sage -n) now supports reactive marimo notebooks (sage -n marimo) after installing marimo in the virtual environment. When ...
github.com
November 11, 2025 at 7:14 PM
Reposted by Matthias Köppe
python.org
Here we are again: stunned & full of hope, because of you–each of you wonderful humans in the #Python community. Since we shared the news about our withdrawal from the NSF grant opportunity two weeks ago, we've received >$160,000 in donations across 1,937 donors, which includes 313 new Members–WOW!
November 10, 2025 at 4:50 PM
Reposted by Matthias Köppe
passagemath.org
An introductory article on #SageMath mentioning passagemath.
currently.att.yahoo.com/tech/computi...
I replaced Mathematica with this free and open-source alternative
SageMath is wise about math from arithmetic to calculus.
currently.att.yahoo.com
November 7, 2025 at 8:23 PM
mkoeppe.bsky.social
Policy update: I will decline all invitations to speak at @cornelluniversity.bsky.social
November 7, 2025 at 6:35 PM
Reposted by Matthias Köppe
passagemath.org
Just released: Version 10.6.33 of passagemath, the pip-installable modularized #SageMath fork, an #OpenSource general-purpose #Mathematics system in #Python.
This version adds support for IPython 9.7.
github.com/passagemath/...
Release passagemath-10.6.33 · passagemath/passagemath
This release adds support for IPython 9.7. What's Changed dist.yml (wheels) [macos]: Our delocate no longer needs joblib by @mkoeppe in #1772 Add float function from upstream by @cxzhong in #1765 ...
github.com
November 7, 2025 at 6:23 PM
Reposted by Matthias Köppe
clontz.org
Tell your friends! Warn your enemies! @mathandcobb.bsky.social will be sharing his take on Math in the Age of Social Media on Monday at the next @code4math.org Convening! Join the conversation on our Zulip:

code4math.zulipchat.com#narrow/chann...
November 6, 2025 at 4:57 PM
Reposted by Matthias Köppe
passagemath.org
Just released: Version 10.6.32 of passagemath, the pip-installable modularized #SageMath fork, an #OpenSource general-purpose #Mathematics system in #Python.
This version adds initial support for free-threaded Python 3.14.
github.com/passagemath/...
Release passagemath-10.6.32 · passagemath/passagemath
Initial support for free-threaded Python 3.14 Wheels are now made available also for free-threaded Python 3.14 (cp314-cp314t). Because not all upstream packages have published wheels for this versi...
github.com
November 5, 2025 at 6:58 PM
Reposted by Matthias Köppe
python.org
Finally, we want to share that everyone at the PSF is full of hope, courage, & strength- because of each & every one of you in the #Python community. We’ve continued to hear from you across a multitude of platforms with messages of support & encouragement– each of which we truly treasure 🥹
November 3, 2025 at 5:31 PM
mkoeppe.bsky.social
I am now a Supporting Member of the #Python Software Foundation.
psfmember.org/python-softw...
Python Software Foundation Supporting Member – Python Software Foundation
psfmember.org
November 1, 2025 at 6:21 PM
Reposted by Matthias Köppe
passagemath.org
Also released: Version 10.5.49, the final release of the passagemath-10.5.x series, which is now EOL.
github.com/passagemath/...
#Python #SageMath #FOSS #Mathematics
Release passagemath-10.5.49 · passagemath/passagemath
This is the final release of the passagemath-10.5.x series. What's Changed [passagemath-10.5.x] Merge pull request #1312 from passagemath/tox-docker--fix-failed-tag-push-2 by @github-actions[bot] ...
github.com
November 1, 2025 at 7:02 AM
Reposted by Matthias Köppe
passagemath.org
Just released: Version 10.6.31 of passagemath, the pip-installable modularized #SageMath fork, a general-purpose #Mathematics system in #Python.
github.com/passagemath/...
This version adds initial support for Python 3.14 and macOS Tahoe; and updates #GAPSystem, #Singular, ...
#FOSS
Release passagemath-10.6.31 · passagemath/passagemath
Initial support for building from source on macOS 26 (Tahoe) Both homebrew and conda-forge are supported. Initial support for Python 3.14 Wheels are now made available also for Python 3.14. Because...
github.com
October 31, 2025 at 9:07 PM
Reposted by Matthias Köppe
python.org
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-...
🧵
The official home of the Python Programming Language
www.python.org
October 27, 2025 at 2:47 PM
Reposted by Matthias Köppe
robin.riley.pub
BAY AREA PEOPLE, find your local Rapid Response Network and put their information into your phone NOW: www.ccijustice.org/carrn

Here is the info for Sonoma and Napa Counties:
North Bay Rapid Responses Network, Sonoma and Napa Counties If you see immigration (ICE) agents in our community, call our hotline 707-800-4544 For more resources visit northbayop.org/rapidresponse If immigration is at your door Don't open your door Remain silent, don't answer any questions Call 707-800-4544, the Rapid Response Network can assist you during and after the incident Show the red card to the agent, without opening the door, slide it under the door and show it through the window Don't sign anything, you have the right to speak to an attorney. We can help
October 22, 2025 at 7:50 PM
Reposted by Matthias Köppe
schmaidt.bsky.social
This was hard work but now we are happy!

The #BOBILib paper has today been accepted for publication in Mathematical Programming Computation!

Here's the final version of the preprint: optimization-online.org/wp-content/u...!

And here's the website bobilib.org!

Spread the word and use it! :-)
October 22, 2025 at 3:47 PM
Reposted by Matthias Köppe
passagemath.org
Release candidate 10.6.31.rc2 of passagemath, the pip-installable modularized #SageMath fork, with more package upgrades
github.com/passagemath/...
#Python #GAPSystem #FOSS #Mathematics
Release passagemath-10.6.31.rc2 · passagemath/passagemath
passagemath-gap updates GAP was updated to version 4.15.1. passagemath-nauty updates nauty was updated to version 2.9.1; release notes. Upgrades of packages in the Sage distribution Normaliz was up...
github.com
October 21, 2025 at 11:19 PM
Reposted by Matthias Köppe
marouanefl.bsky.social
The 2026 Land-Doig Competition is open! This year’s topic is GPU-Accelerated Primal Heuristics for Mixed-Integer Programming. Details below.

www.mixedinteger.org/2026/competi...
MIPcc26: The 2026 Land-Doig MIP Competition
www.mixedinteger.org
October 20, 2025 at 4:02 PM
Reposted by Matthias Köppe
eva.computer
white house has joined bluesky
click here to block all official us government accounts instantly

bsky.app/profile/did:...
October 17, 2025 at 10:08 PM
Reposted by Matthias Köppe
passagemath.org
Release candidate 10.6.31.rc1 with transition to C++17, macOS Tahoe support, package upgrades
github.com/passagemath/...
#Python #SageMath #FOSS #Mathematics
Release passagemath-10.6.31.rc1 · passagemath/passagemath
Initial support for building from source on macOS 26 (Tahoe) passagemath-lcalc updates lcalc was updated to version 2.1.1. passagemath-linbox updates LinBox was updated to version 1.7.1. passagemat...
github.com
October 17, 2025 at 3:58 AM
mkoeppe.bsky.social
#otd 1 year ago I created the @passagemath.org fork of #SageMath, the general-purpose #OpenSource #Mathematics system in #Python.
I created the fork in response to the Sage project's final decline into systemic toxicity; in hindsight, the step was long overdue.
github.com/passagemath/...
src/bin/sage-update-version: passagemath · passagemath/passagemath@01ca09d
github.com
October 14, 2025 at 7:23 PM
Reposted by Matthias Köppe
passagemath.org
The passagemath project maintains an updated version of the #SageMath distribution, in part for use with #cibuildwheel.
The passagemath-10.6.30 release notes now give an overview of the non-Python packages upgraded in (or only available in) passagemath's version of the Sage distribution.
October 12, 2025 at 9:57 PM
Reposted by Matthias Köppe
passagemath.org
Added in post: Binary wheels for passagemath-macaulay2 are now also available for Linux on ARM.
#SageMath #Macaulay2 #Python #FOSS #Mathematics
October 12, 2025 at 6:49 PM
Reposted by Matthias Köppe
sophie.huiberts.me
found an IRL linear program, took some pictures
4 photos showing the same thing from different angles. a convex polyhedron made of glass, with black edges, is held in two hands. the hands wear white gloves, the polyhedron is wider than it is tall or deep. width is around 4 hands, other dimensions are about one and a half. inside the polyhedron is a orange ping pong ball, and is has found its resting spot at the bottom vertex. hence it solves the LP of minimizing height subject to being inside the polyhedron
October 11, 2025 at 7:09 PM
Reposted by Matthias Köppe
clontz.org
A recording is now available on our @code4math.org Zulip (must be logged in)! code4math.zulipchat.com#narrow/chann...
October 8, 2025 at 6:19 PM