Mathlib Changelog
v4
Changelog
About
Github
Theorem
Coalgebra.sum_counit_smul
Modification history
2025-08-13 21:32
Mathlib/RingTheory/Coalgebra/Basic.lean
feat: `counit (antipode a) = counit a` (#25267) …
Added
Coalgebra.sum_counit_smul
View on Github →