The zero interval and mutable matrices
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Linear Algebra
- Dominant language
- Macaulay2
- Stars
- 435
- Forks
- 297
- Avg merge
- 4d 20h
- Merged PRs (30d)
- 11
Description
All of the following code works as expected:
new Matrix from matrix{{span(0)}}
new Matrix from matrix{{span(1)}}
new MutableMatrix from matrix{{span(1)}}
The next line of code produces a matrix with an empty interval and NotANumber endpoints.
new MutableMatrix from matrix{{span(0)}}
I don't know enough about MutableMatrix to know what's going on here.
@mikestillman
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Research direction
Reproduce the four snippets in a Macaulay2 session, then trace the MutableMatrix handling of a zero interval and compare it with Matrix and the nonzero case. Done means new MutableMatrix from matrix{{span(0)}} no longer produces an empty interval or NaN endpoints, with a regression test covering the behavior.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100