JuliaApproximation / JuliaApproximation/ApproxFunBase.jl
Why does ZeroOperator have a rangespace?
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- Julia
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Description
ZeroOperator maps whatever Fun to zero on a specific Domain. Whatever space on that Domain doesn't matter.
For example, there is an Operator called C from space S1 to space S2. There is a ZeroOperator called D from space S1 to space S3. S2 and S3 are both spaces on [-1,1].
Executing C+D will trigger a conversion between S2 and S3, which can't succeed in general for random S2 and S3. But C+D should be C AFAIK.
IMO the field rangespace of ZeroOperator should be replaced by domain.
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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 locating the ZeroOperator definition and the dispatch or implementation for C+D. Check how rangespace and domain are used when combining operators, then determine whether the proposed domain-based behavior avoids conversion between unrelated range spaces. Done means the intended ZeroOperator semantics are established and covered by relevant tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100