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[Merged by Bors] - feat(data/set/finite): complement of finite set is infinite #6266

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Add two missing lemmas. One-line proofs due to Yakov Pechersky.


Alternative names: infinite_of_finite_compl -> infinite_of_compl_finite and compl_infinite_of_finite -> infinite_compl_of_finite. Any comments? I went with
the "prefix notation order" as it were.

@kbuzzard kbuzzard added the WIP Work in progress label Feb 16, 2021
src/data/set/finite.lean Outdated Show resolved Hide resolved
Co-authored-by: Yakov Pechersky <pechersky@users.noreply.github.com>
@kbuzzard kbuzzard added awaiting-review The author would like community review of the PR and removed WIP Work in progress labels Feb 17, 2021
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Yakov's suggestion of finite.infinite_compl is even better.

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Thanks!
bors r+

@github-actions github-actions bot added ready-to-merge All that is left is for bors to build and merge this PR. (Remember you need to say `bors r+`.) and removed awaiting-review The author would like community review of the PR labels Feb 17, 2021
bors bot pushed a commit that referenced this pull request Feb 17, 2021
Add two missing lemmas. One-line proofs due to Yakov Pechersky.
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bors bot commented Feb 17, 2021

Pull request successfully merged into master.

Build succeeded:

@bors bors bot changed the title feat(data/set/finite): complement of finite set is infinite [Merged by Bors] - feat(data/set/finite): complement of finite set is infinite Feb 17, 2021
@bors bors bot closed this Feb 17, 2021
@bors bors bot deleted the finite-compl branch February 17, 2021 07:54
b-mehta pushed a commit that referenced this pull request Apr 2, 2021
Add two missing lemmas. One-line proofs due to Yakov Pechersky.
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3 participants