Theorem Finset.card_le_card_of_injOn

Modification history

2025-07-04 14:26
Mathlib/Data/Finset/Card.lean
chore(Finset/Card): cleanup section and improve documentation (#26373) …
Modified Finset.card_le_card_of_injOnView on Github →
2024-06-12 09:13
Mathlib/Data/Finset/Card.lean
feat: Cardinality of a finset under a surjective map (#13435) …
Added Finset.card_le_card_of_injOnView on Github →