lean-ja / lean-ja/lean-by-example
排中律があれば free theorem の反例が得られる
Open
Nobody has claimed this yet.
コード例
- Dominant language
- Lean
- Stars
- 188
- Forks
- 15
- Avg merge
- 9h 8m
- Merged PRs (30d)
- 6
Description
open Classical
noncomputable def badId {α : Type} : α → α := fun a =>
if h : α = Bool then by
rw [h]
exact false
else a
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
Start by reading the issue's Lean example and the surrounding reference content in the repository. Confirm what documentation or example change is intended, then define a concrete expected result and verify the updated Lean snippet or rendered reference content.
Written by the indexing model from the issue text.
Assessment
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100