Theorem Set.nontrivial_of_preimage

Modification history

2024-09-15 15:14
Mathlib/Data/Set/Image.lean
feat(Data/Set/Image): the image of a nontrivial set is nontrivial (#16823) …
Modified Set.nontrivial_of_preimageView on Github →
2022-12-12 07:45
Mathlib/Data/Set/Image.lean
feat: Port Data.Set.Image (#949) …
Added Set.nontrivial_of_preimageView on Github →