leanprover-community / leanprover-community/mathlib4

Porting note: `simp` cannot prove this

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Nobody has claimed this yet.

porting-notes
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Description

Classifies porting notes claiming anything semantically equivalent to:

  • "simp cannot prove this"
  • "simp used to be able to close this goal"
  • "simp can't handle this"
  • "simp used to work here"
Examples

https://github.com/leanprover-community/mathlib4/blob/ddd23d7fb371ea80519b69192cb31352c20dc043/Mathlib/SetTheory/Ordinal/Arithmetic.lean#L1158-L1167

https://github.com/leanprover-community/mathlib4/blob/ddd23d7fb371ea80519b69192cb31352c20dc043/Mathlib/Analysis/Quaternion.lean#L88-L91

https://github.com/leanprover-community/mathlib4/blob/ddd23d7fb371ea80519b69192cb31352c20dc043/Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean#L337-L373

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 by reading the three example porting notes in Mathlib/SetTheory/Ordinal/Arithmetic.lean, Mathlib/Analysis/Quaternion.lean, and Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean. Determine the intended classification behavior for the listed semantic variants; done means those examples and equivalent wording are classified consistently.

Written by the indexing model from the issue text.

Assessment

Domain
documentation
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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