negative numbers from minimalBetti
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- Dominant language
- Macaulay2
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Description
This seems to only happen when I run M2 on HPCs. I don't know what's causing the instability and I haven't been able to reproduce it locally. Here is a very egregious case:
This was in a non-standard graded ring with degrees 1,1,1,1,1,1,2,2,2,2,2,2,3 over ZZ/32003.
cc: @mikestillman
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by examining minimalBetti and the reported behavior when running M2 on HPC systems, using the non-standard graded ring over ZZ/32003 as the available reproduction case. Determine why negative values can be produced and establish a reproducible check showing that minimalBetti no longer returns invalid negative numbers.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Active
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100