Expose `trace_gen_inv_quad_form_ldlt` and `trace_inv_quad_form_ldlt` but for cholesky factors
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- Dominant language
- C++
- Stars
- 839
- Forks
- 220
- Avg merge
- 2d 4h
- Merged PRs (30d)
- 14
Description
Can we expose these but for cholesky factors since Stan doesn't have LDLt decomp?
Contributor guide
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
The issue names no files, tests, or entry points. Start by locating trace_gen_inv_quad_form_ldlt and trace_inv_quad_form_ldlt, then inspect how their LDLt-based behavior is exposed and tested. Done means equivalent operations are exposed for Cholesky factors, with coverage for the supported automatic-differentiation modes.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- backend
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100