feat(data/finset): new basic material on finsets and fintypes #2068
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sgouezel
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Co-Authored-By: Johan Commelin <johan@commelin.net>
Co-Authored-By: Johan Commelin <johan@commelin.net>
Co-Authored-By: Johan Commelin <johan@commelin.net>
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…over-community#2068) * feat(data/finset): additional basic material * minor fixes * golfed * Update src/data/finset.lean Co-Authored-By: Johan Commelin <johan@commelin.net> * Update src/data/finset.lean Co-Authored-By: Johan Commelin <johan@commelin.net> * Update src/data/finset.lean Co-Authored-By: Johan Commelin <johan@commelin.net> * golfed Co-authored-by: Johan Commelin <johan@commelin.net> Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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…over-community#2068) * feat(data/finset): additional basic material * minor fixes * golfed * Update src/data/finset.lean Co-Authored-By: Johan Commelin <johan@commelin.net> * Update src/data/finset.lean Co-Authored-By: Johan Commelin <johan@commelin.net> * Update src/data/finset.lean Co-Authored-By: Johan Commelin <johan@commelin.net> * golfed Co-authored-by: Johan Commelin <johan@commelin.net> Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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Some new material on finsets and fintypes, notably simp lemmas related to inclusions or difference of fintypes. Also
fintype.pi_finsetfor the finset of functions defined on a fintype taking values in given finsets.I took this occasion to lint the file
finset.lean.