Mathlib Changelog
v3
Changelog
About
Github
Mathlib v3 is deprecated.
Go to Mathlib v4
Theorem
card_derangements_eq_num_derangements
Modification history
2021-09-16 13:26
src/combinatorics/derangements/finite.lean
feat(combinatorics/derangements/*): add lemmas about counting derangements (#9089) …
Added
card_derangements_eq_num_derangements
View on Github →