Mathlib v3 is deprecated. Go to Mathlib v4

Theorem function.bijective.comp_left

Modification history

2021-12-10 21:59
src/logic/function/basic.lean
feat(logic/function/basic): surjective function is an epimorphism (#10691) …
Modified function.bijective.comp_leftView on Github →
2021-11-23 15:06
src/logic/function/basic.lean
feat(logic/function/basic): add `function.{in,sur,bi}jective.comp_left` (#10406) …
Added function.bijective.comp_leftView on Github →