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Theorem function.surjective.nonempty_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 function.surjective.nonempty_preimageView on Github →
2021-08-04 19:46
src/data/set/basic.lean
chore(data/real/basic): drop some lemmas (#8523) …
Added function.surjective.nonempty_preimageView on Github →