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Theorem set.nontrivial_of_preimage

Modification history

2022-12-07 20:30
src/data/set/basic.lean
refactor(data/set/basic): move image, preimage, and range to a new file (#17842) …
Modified set.nontrivial_of_preimageView on Github →
2022-08-16 13:24
src/data/set/basic.lean
feat(data/set/basic): Add `set.nontrivial` predicate and API (#15867) …
Added set.nontrivial_of_preimageView on Github →