JuliaDiff / JuliaDiff/ChainRulesCore.jl
Explicit Rules for Higher Order "Adjoints"
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speculative
- Dominant language
- Julia
- Stars
- 267
- Forks
- 66
- PR merge metrics
- No merged PRs in 30d
Description
Can the API for adding an adjoint rule allow for explicitly specifying the rule for a higher order adjoint?
e.g. D(sin,x) = v -> v * cos(x) but I also know that D(sin,x; n=2) = (v1,v2) -> v2*v1*(- sin(x))
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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 reviewing the existing API for adding adjoint rules and how higher-order rules are currently represented. Determine whether the API can explicitly select a rule for a specified derivative order; done means the issue's first- and second-order examples can be expressed and covered by suitable tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- backend-api-design
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100