JuliaDiff / JuliaDiff/ReverseDiff.jl

Implement more of Giles' linear algebra derivatives

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Dominant language
Julia
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393
Forks
60
Avg merge
18h 24m
Merged PRs (30d)
8

Description

Many of ReverseDiff's linear algebra derivative implementations are based on a wonderful reference paper by Mike B. Giles. It turns out that, in his infinite generosity, Giles released an extended version of the paper shortly after the original paper, which contains even more derivative definitions (including some factorizations).

We should implement the rest of these in ReverseDiff for the sake of completeness.

(Thanks to @tpapp for exposing me to the extended version of the Giles paper in his ForwardDiff issue.)

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue names ReverseDiff's linear algebra derivative implementations but no files, tests, or entry points. Start by comparing the existing implementations with Giles's extended paper, identify the missing derivative definitions and factorizations, and establish coverage for each addition.

Written by the indexing model from the issue text.

Assessment

Tech stack
julia
Domain
tooling
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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