leanprover / leanprover/reference-manual

Term vs tactic mode `rfl`

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Lean
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Description

What question should the reference manual answer?

What is the difference between := rfl and := by rfl?

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

Locate the reference-manual section covering rfl and term/tactic syntax, then read its existing explanations and examples. Document the distinction between := rfl and := by rfl with clear examples, and verify the wording against the manual's terminology.

Written by the indexing model from the issue text.

Assessment

Domain
documentation
Issue type
Documentation
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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