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Macaulay2

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This group is devoted to discussions and questions about Macaulay2. Bug reports should be submitted directly to our issue tracker.

Messages from new users are moderated, and that takes time, so don't post your first message twice.

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mike stillman, … Paul Zinn-Justin16

2:54 AM

Announcement

Macaulay2 web server

The unimelb-macaulay2 Macaulay2Web server is down for reasons that are beyond my control. Hopefully

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Announcement

Macaulay2 web server

The unimelb-macaulay2 Macaulay2Web server is down for reasons that are beyond my control. Hopefully

2:54 AM

Reginald Anderson, … Thomas Kahle13

Jun 10

Detecting whether digraph has cycles

Hi everyone. Tobias fixed this earlier this year: https://github.com/Macaulay2/M2/issues/3626 https:/

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Detecting whether digraph has cycles

Hi everyone. Tobias fixed this earlier this year: https://github.com/Macaulay2/M2/issues/3626 https:/

Jun 10

Nickolay Trendafilov

Jun 6

regression on simplexes

Hi, my field of interests is multivariate data analysis. Nevertheless, I have a problem that might be

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regression on simplexes

Hi, my field of interests is multivariate data analysis. Nevertheless, I have a problem that might be

Jun 6

Doug Torrance

Jun 2

Macaulay2 1.25.06 released

Macaulay2 1.25.06 has been released. This is a minor patch version with very few changes from 1.25.05

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Macaulay2 1.25.06 released

Macaulay2 1.25.06 has been released. This is a minor patch version with very few changes from 1.25.05

Jun 2

Hola

Jun 2

K-basis of Homology of a simplicial complex

The question concerns how to compute a K-basis of the group homology of a simplicial complex. Using

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K-basis of Homology of a simplicial complex

The question concerns how to compute a K-basis of the group homology of a simplicial complex. Using

Jun 2

Kriti Goel, Michael Burr5

May 30

optional inputs for associatedPrimes

This was helpful. Thanks! I will run some examples to compare the computational timings via this

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optional inputs for associatedPrimes

This was helpful. Thanks! I will run some examples to compare the computational timings via this

May 30

David Eisenbud

May 29

(res, Module, ZZ)

In the new system, when making a resolution over a factor (non-regular) ring (which I often do!), it

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(res, Module, ZZ)

In the new system, when making a resolution over a factor (non-regular) ring (which I often do!), it

May 29

Kumar Sannidhya Shukla

May 26

isSmooth giving unexpected results.

Hello Macaulay2 users, Calling isSmooth on a toric variety is giving unexpected result. Consider the

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isSmooth giving unexpected results.

Hello Macaulay2 users, Calling isSmooth on a toric variety is giving unexpected result. Consider the

May 26

Wbwvwv 2fwcweg, … Lily Silverstein3

May 23

Extracting one-degree terms from polynomial

It could also be helpful to use "any" and "all" here. select(L, m -> any(

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Extracting one-degree terms from polynomial

It could also be helpful to use "any" and "all" here. select(L, m -> any(

May 23

Hola

May 23

Transforming undirected trees into directed trees - Macaulay2/NautyGraphs

I'm working with the NautyGraphs package in Macaulay2, and I use it to generate all the

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Transforming undirected trees into directed trees - Macaulay2/NautyGraphs

I'm working with the NautyGraphs package in Macaulay2, and I use it to generate all the

May 23

Hola

May 23

Transforming undirected trees into rooted directed trees

I'm working with the NautyGraphs package in Macaulay2, and I use it to generate all triangle-free

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Transforming undirected trees into rooted directed trees

I'm working with the NautyGraphs package in Macaulay2, and I use it to generate all triangle-free

May 23

Matthias Köppe

May 23

Announce: passagemath-macaulay2 10.5.33 - Python interface to Macaulay2

passagemath-macaulay2 (https://pypi.org/project/passagemath-macaulay2/) is one of the pip-installable

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Announce: passagemath-macaulay2 10.5.33 - Python interface to Macaulay2

passagemath-macaulay2 (https://pypi.org/project/passagemath-macaulay2/) is one of the pip-installable

May 23

David Eisenbud, Mahrud Sayrafi2

May 18

bug in Ext with yonedaExtension

I can't reproduce this issue yet. yonedaExtension is only defined in Complexes, and only works if

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bug in Ext with yonedaExtension

I can't reproduce this issue yet. yonedaExtension is only defined in Complexes, and only works if

May 18

David Eisenbud, Mahrud Sayrafi9

May 17

source of the "random" bug

Thanks -- everything is now working (had to add LengthLimits in quite a few places, too.) David --

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source of the "random" bug

Thanks -- everything is now working (had to add LengthLimits in quite a few places, too.) David --

May 17

David Eisenbud, Mahrud Sayrafi2

May 17

bug in new version: random maps go in wrong direction

Ah, that's a bug that was introduced recently. Here is the workaround: random' = (F, G) ->

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bug in new version: random maps go in wrong direction

Ah, that's a bug that was introduced recently. Here is the workaround: random' = (F, G) ->

May 17

Doug Torrance

May 15

Macaulay2 1.25.05 released

Dear Macaulay2 user, We are happy to announce the release of Macaulay2, version 1.25.05. For the list

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Macaulay2 1.25.05 released

Dear Macaulay2 user, We are happy to announce the release of Macaulay2, version 1.25.05. For the list

May 15

Doug Torrance3

May 1

Forthcoming release 1.25.05

This is a reminder that the deadline to submit a pull request for the next release of Macaulay2 is

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Forthcoming release 1.25.05

This is a reminder that the deadline to submit a pull request for the next release of Macaulay2 is

May 1

Xiangru Zeng

Apr 22

Trying to find an easy way to calculate the tangent space ("Cremona", "MultiprojectiveVarieties")

What I need to do is to calculate (the dimension of) the tangent space of a multiprojective variety

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Trying to find an easy way to calculate the tangent space ("Cremona", "MultiprojectiveVarieties")

What I need to do is to calculate (the dimension of) the tangent space of a multiprojective variety

Apr 22

Sebastian Calvo

Apr 16

Question on loading a big file

Hi all, Currently, I am working with some elements of a group. Each element is stored as a map(S,S, {

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Question on loading a big file

Hi all, Currently, I am working with some elements of a group. Each element is stored as a map(S,S, {

Apr 16

Sebastian Calvo, … Luke Oeding3

Mar 31

Running Macaulay2 on Visual Studio Code

A small update - because of file permissions I wasn't able to do what Sebastian suggested and

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Running Macaulay2 on Visual Studio Code

A small update - because of file permissions I wasn't able to do what Sebastian suggested and

Mar 31

Shrikant Shekhar 1910404, … Frank Moore4

Mar 26

Issue with Checking Golod Property Using Koszul Complex

Thanks a lot for your help. Shrikant. On Saturday, March 22, 2025 at 9:30:30 PM UTC+5:30 Frank Moore

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Issue with Checking Golod Property Using Koszul Complex

Thanks a lot for your help. Shrikant. On Saturday, March 22, 2025 at 9:30:30 PM UTC+5:30 Frank Moore

Mar 26

Norio Kosaka, Doug Torrance2

Mar 24

Issue with Building Macaulay2 from Source – No Makefile Found

Were there any error messages after calling "../../configure"? The existence of config.log

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Issue with Building Macaulay2 from Source – No Makefile Found

Were there any error messages after calling "../../configure"? The existence of config.log

Mar 24

Thomas Brazelton

Mar 13

M2 Workshop at UW-Madison (Summer 2025)

Hi everyone, We will be hosting a Macaulay2 workshop at UW-Madison the week of June 30 - July 4, 2025

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M2 Workshop at UW-Madison (Summer 2025)

Hi everyone, We will be hosting a Macaulay2 workshop at UW-Madison the week of June 30 - July 4, 2025

Mar 13

Hans-Christian Herbig, Jürgen Böhm4

Feb 24

conormal module

Dear Jürgen, R=QQ[q1,q2,p1,p2] I=ideal(q1*p2,q2*p1,q1*p1-q2*p2) Q=R/I M=(I/I^2)**Q gives cokernel {2}

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conormal module

Dear Jürgen, R=QQ[q1,q2,p1,p2] I=ideal(q1*p2,q2*p1,q1*p1-q2*p2) Q=R/I M=(I/I^2)**Q gives cokernel {2}

Feb 24

Andre Saint Eudes MIALEBAMA BOUESSO, Mahrud Sayrafi3

Feb 11

Homogeneous part of degree d

Dear Mahrud, Thank you very much. My problems are now solved and I am happy. Best, Andre On Fri, 7

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Homogeneous part of degree d

Dear Mahrud, Thank you very much. My problems are now solved and I am happy. Best, Andre On Fri, 7

Feb 11

Annie Giokas, … mike stillman10

Feb 4

Setting up Jupyter for Macaulay2

One problem I found with the newest notebook seemed to be the ability to stop line wrapping (and add

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Setting up Jupyter for Macaulay2

One problem I found with the newest notebook seemed to be the ability to stop line wrapping (and add

Feb 4

Baptiste Calmès, … Irena Swanson8

Feb 4

[Macaulay2] localization

To localize at an element f in a ring R, adjoin a new variable, say Y, and for the new ring R[Y]/

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[Macaulay2] localization

To localize at an element f in a ring R, adjoin a new variable, say Y, and for the new ring R[Y]/

Feb 4

Hans-Christian Herbig

Feb 3

problems with the conormal module

Hello, I have a rather basic question. How can I use M2 to calculate the syzygies of I/I^2? R=QQ[q1,

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problems with the conormal module

Hello, I have a rather basic question. How can I use M2 to calculate the syzygies of I/I^2? R=QQ[q1,

Feb 3

Kalina Mincheva

Jan 28

M2 workshop at Tulane

Tulane University will host a Macaulay2 workshop from April 14 - April 18, 2025. This event is a five

unread,

M2 workshop at Tulane

Tulane University will host a Macaulay2 workshop from April 14 - April 18, 2025. This event is a five

Jan 28

naddi...@gmail.com, Mahrud Sayrafi2

Jan 2

funny output from trim

Hi Nick, This definitely looks like a bug to me. I'll open an issue on GitHub. Best, Mahrud On

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funny output from trim

Hi Nick, This definitely looks like a bug to me. I'll open an issue on GitHub. Best, Mahrud On

Jan 2