lean-ja / lean-ja/lean-by-example
injection タクティクの simp に比べた利点
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メモ
- Dominant language
- Lean
- Stars
- 188
- Forks
- 15
- Avg merge
- 9h 8m
- Merged PRs (30d)
- 6
Description
MyNat を定義したとき、m + 1 = n + 1 から m = n を導けるのは injection
simp は + 記号になっているとダメ。succ でないといけない。
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
No file or test is named in the issue. Start by locating the documentation example that defines MyNat and demonstrates injection or simp, then clarify the comparison using the equation m + 1 = n + 1; done means the example explains why simp requires succ while injection handles the stated form.
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
- Mostly clear
- Newbie friendliness
- 35/100