leanprover / leanprover/sos

feat(search): relaxation hierarchy / automatic depth search

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area:search roadmap
Dominant language
Lean
Stars
8
Forks
1
Avg merge
53m
Merged PRs (30d)
2

Description

Background

by sos currently uses one fixed relaxation level by default. Users can opt into extra depth through tactic config, but the search does not automatically walk a hierarchy on failure.

Desired outcome

Design an automatic, bounded relaxation-depth schedule that improves completeness on Putinar-style goals while keeping default behavior predictable.

Notes

The implementation should account for SDP size blow-up, basis strategy choice, CSDP runtime, and error messages when the configured search budget is exhausted.

Contributor guide

Open the contributing guide

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

Start with the by sos entry point and its tactic configuration, then trace how the fixed relaxation level and failure path are handled. Review the constraints around SDP size, basis strategy, CSDP runtime, and exhausted search budgets. Done means a bounded automatic depth schedule improves completeness while keeping default behavior predictable and errors useful.

Written by the indexing model from the issue text.

Assessment

Domain
tooling
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
30/100

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