Macaulay2

1–30 of 1325

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.

0 selected

Luke Oeding

May 23

Jordan form problem

I'm having a problem computing the Jordan form for a large matrix. The issue I'm seeing is

unread,

Jordan form problem

I'm having a problem computing the Jordan form for a large matrix. The issue I'm seeing is

May 23

Daniel R. Grayson

May 21

Macaulay2 1.20 released

Dear Macaulay2 user, We are happy to announce the release of Macaulay2, version 1.20. For the list of

unread,

Macaulay2 1.20 released

Dear Macaulay2 user, We are happy to announce the release of Macaulay2, version 1.20. For the list of

May 21

KSchwede, … Daniel R. Grayson6

May 19

Macaulay2 in emacs issue

So how did using the wrong version of emacs prevent it from working? Was it a version of emacs that

unread,

Macaulay2 in emacs issue

So how did using the wrong version of emacs prevent it from working? Was it a version of emacs that

May 19

Michael Morrow, … Paul Zinn-Justin17

May 11

Storing old behavior of methods

Actually, I had similar issues in my package CotangentSchubert. Namely, I wanted to define

unread,

Storing old behavior of methods

Actually, I had similar issues in my package CotangentSchubert. Namely, I wanted to define

May 11

Xiaowen Hu, Daniel R. Grayson3

May 11

Where can I find an old version of M2?

Thanks. I have found a 1.16 version, and it works fine on 10.15. Best, Xiaowen Daniel R. Grayson <

unread,

Where can I find an old version of M2?

Thanks. I have found a 1.16 version, and it works fine on 10.15. Best, Xiaowen Daniel R. Grayson <

May 11

Yizhou Kuang, Daniel R. Grayson2

May 11

Solving a sequence of polynomial systems on MATLAB

My vague impression of MATLAB is that it's mainly for numerical linear algebra, and thus can'

unread,

Solving a sequence of polynomial systems on MATLAB

My vague impression of MATLAB is that it's mainly for numerical linear algebra, and thus can'

May 11

Caccio Dj, Daniel R. Grayson2

May 11

Exercise

The answer you cite is simply the definition of singular point. Maybe what you really want to do is

unread,

Exercise

The answer you cite is simply the definition of singular point. Maybe what you really want to do is

May 11

sankhaneel bisui, Daniel R. Grayson3

May 8

Installation Error Version 1.19.1: error: key not found in dictionary

Thank you, Dr. Grayson, this works. On Sun, May 8, 2022 at 11:04 AM Daniel R. Grayson <

unread,

Installation Error Version 1.19.1: error: key not found in dictionary

Thank you, Dr. Grayson, this works. On Sun, May 8, 2022 at 11:04 AM Daniel R. Grayson <

May 8

Avi Steiner, Daniel R. Grayson3

May 5

M2 website down

You can also use http://macaulay2.com/.

unread,

M2 website down

You can also use http://macaulay2.com/.

May 5

jatinm...@gmail.com, … Irena Swanson5

May 3

Integral closure error

You get P1 and P2 with running primaryDecomposition (of the ideal). Then Ki = R/Pi. The integral

unread,

Integral closure error

You get P1 and P2 with running primaryDecomposition (of the ideal). Then Ki = R/Pi. The integral

May 3

Dharm Veer, Shrikant Shekhar 19104043

Apr 29

Having issue in loading the M2 package "Depth.m2"

Hi, This works. Dharm. On Thursday, April 28, 2022 at 5:09:12 PM UTC+5:30 shrik...@iiserb.ac.in wrote

unread,

Having issue in loading the M2 package "Depth.m2"

Hi, This works. Dharm. On Thursday, April 28, 2022 at 5:09:12 PM UTC+5:30 shrik...@iiserb.ac.in wrote

Apr 29

Daniel R. Grayson2

Apr 21

forthcoming Macaulay2 release 1.20

PS: Authors should also consider adding an entry to the file "changes.m2" in the node

unread,

forthcoming Macaulay2 release 1.20

PS: Authors should also consider adding an entry to the file "changes.m2" in the node

Apr 21

thomas buschman

Apr 18

Macaulay2 Groebner Basis

Hi all, I've been trying to calculate a groebner basis, while storing the highest degree that was

unread,

Macaulay2 Groebner Basis

Hi all, I've been trying to calculate a groebner basis, while storing the highest degree that was

Apr 18

Lina Liu, Tim Duff2

Apr 12

Error: Can you manually seed?

Hi Lina, The error message you got also suggests trying an un-exported method called "

unread,

Error: Can you manually seed?

Hi Lina, The error message you got also suggests trying an un-exported method called "

Apr 12

KSchwede3

Apr 7

Macaulay2 in VSCode, slight settings improvement

One other quick comment. Recently there have been some changes in some vscode shortcuts, the

unread,

Macaulay2 in VSCode, slight settings improvement

One other quick comment. Recently there have been some changes in some vscode shortcuts, the

Apr 7

Taylor Ball, … Anton4

Apr 7

How does Macaulay2 represent polynomials?

Hi Taylor, You may be interested in joining M2internals: https://github.com/Macaulay2/M2/wiki/

unread,

How does Macaulay2 represent polynomials?

Hi Taylor, You may be interested in joining M2internals: https://github.com/Macaulay2/M2/wiki/

Apr 7

Caccio Dj, Baptiste Calmès2

Apr 6

Dimension

Generally speaking, the notion of dimension used in commutative algebra and algebraic geometry is the

unread,

Dimension

Generally speaking, the notion of dimension used in commutative algebra and algebraic geometry is the

Apr 6

Francesca Gandini, jche...@gmail.com3

Apr 3

Linear algebra methods?

Hi Francesca, In theory factorization in (rings of integers of) number fields is a special case of

unread,

Linear algebra methods?

Hi Francesca, In theory factorization in (rings of integers of) number fields is a special case of

Apr 3

Avi Steiner, jche...@gmail.com3

Apr 1

computing an intersection of submodules over different rings

Thanks! That works! :) On Friday, April 1, 2022 at 8:12:04 PM UTC-4 jche...@gmail.com wrote: Hi Avi,

unread,

computing an intersection of submodules over different rings

Thanks! That works! :) On Friday, April 1, 2022 at 8:12:04 PM UTC-4 jche...@gmail.com wrote: Hi Avi,

Apr 1

Lina Liu, Michael Burr2

Mar 31

For your code, you should change x=2 to x-2 so that it's a polynomial. You will also likely want

unread,

For your code, you should change x=2 to x-2 so that it's a polynomial. You will also likely want

Mar 31

Annie Giokas, Youngsu2

Mar 27

Setting up Jupyter for Macaulay2

Thank you for the information. I could add the kernel, but I get the "KERNEL ENFORCED TIMEOUT

unread,

Setting up Jupyter for Macaulay2

Thank you for the information. I could add the kernel, but I get the "KERNEL ENFORCED TIMEOUT

Mar 27

Eloísa Grifo, … jche...@gmail.com9

Mar 23

What is wrong with this primary decomposition calculation?

Dan: I believe 1.16 doesn't use MinimalPrimes.m2 by default (ie does exactly what Strategy =>

unread,

What is wrong with this primary decomposition calculation?

Dan: I believe 1.16 doesn't use MinimalPrimes.m2 by default (ie does exactly what Strategy =>

Mar 23

Byeongsu Yu, … Mahrud Sayrafi3

Mar 12

How to change default list "path" initially?

It's also possible that you need to remove the file "/Users/byeongsuyu/Library/Application

unread,

How to change default list "path" initially?

It's also possible that you need to remove the file "/Users/byeongsuyu/Library/Application

Mar 12

amal, Brian Pike3

Mar 12

Vector field

Dear Brian, Thank you very much for your reply! I prefer the second approach you proposed however I

unread,

Vector field

Dear Brian, Thank you very much for your reply! I prefer the second approach you proposed however I

Mar 12

Bryson Kagy, Daniel R. Grayson2

Mar 10

index of a Variable

Try something like this: Macaulay2, version 1.19.1 with packages: ConwayPolynomials, Elimination,

unread,

index of a Variable

Try something like this: Macaulay2, version 1.19.1 with packages: ConwayPolynomials, Elimination,

Mar 10

Paul Zinn-Justin, Frank Moore3

Mar 4

extracting submodules

Thanks Frank. that worked! On Sat, 5 Mar 2022 at 00:54, Frank Moore <moorewf@wfu.edu> wrote: I

unread,

extracting submodules

Thanks Frank. that worked! On Sat, 5 Mar 2022 at 00:54, Frank Moore <moorewf@wfu.edu> wrote: I

Mar 4

Lina Liu, Federico Galetto2

Mar 2

Group Order Function for M2?

Hi Lina, The InvariantRing package can generate a finite matrix group given some generators and can

unread,

Group Order Function for M2?

Hi Lina, The InvariantRing package can generate a finite matrix group given some generators and can

Mar 2

Chloe :D, … Tim Duff3

Feb 28

How to interpret the result of NumericalVariety

A useful command here is "components", which returns a list of witness sets representing

unread,

How to interpret the result of NumericalVariety

A useful command here is "components", which returns a list of witness sets representing

Feb 28

Pietro Beri, jche...@gmail.com4

Feb 28

Linearspan

Sorry, of course ell has to be the intersection of the ideals, not the product! Just a stupid mistake

unread,

Linearspan

Sorry, of course ell has to be the intersection of the ideals, not the product! Just a stupid mistake

Feb 28

Michael Burr, Daniel R. Grayson4

Feb 25

Seg-fault in monoid construction

That's mysterious - I wonder what GC_malloc_kind is. This libgc bug report looks sort of similar:

unread,

Seg-fault in monoid construction

That's mysterious - I wonder what GC_malloc_kind is. This libgc bug report looks sort of similar:

Feb 25