Macaulay2 is a system for computing in commutative algebra, algebraic geometry and related fields. The system was originally written by Dan Grayson and Mike Stillman. David Eisenbud joined the project a number of years ago, and many users are writing packages for the system, and some are contributing source code. See our web page Macaulay2.com for more details and for downloading binary releases.
The structure of this directory is as follows:
M2: contains everything needed by a user to build Macaulay2.bugs: contains older bug reports.
See CITATION.cff for information about citing Macaulay2.
Contributions to the code of Macaulay2 are welcome. The source code is available via our GitHub repository, where you can also report bugs via the issue tracker. For brief instructions, see here.
To start working on an existing github "issue", volunteer to work on it, so you can get "assigned" to the issue, thereby preventing duplication of effort.
To make a contribution, submit a "pull request" on github. If the
contribution involves changing an existing package in a non-trivial way, we
will normally contact the authors to get their approval of the change. If a
new package with mathematical content is submitted, it will normally be
accepted if it can be installed with installPackage and the tests pass as
determined by check, in the latest version of Macaulay2.
Copyright (C) 1993-2025 The Macaulay2 Authors
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Macaulay2 binaries are licensed under GPL-3.0 due to linking with LGPL-3.0 libraries (FLINT, MPFR). See https://www.gnu.org/licenses/gpl-faq.html#AllCompatibility
