lean-ja / lean-ja/lean-by-example
injection の対義語は2つある
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- Lean
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Description
- 圏論の話してるときは projection
- 集合の話ししてるときは surjection
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 locating the documentation or example that discusses injection and identify where its terminology is defined. Update the relevant explanation to distinguish projection in category theory from surjection in set theory, then check that the surrounding wording remains consistent.
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
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 48/100