Theorem PFun.ran_eq_empty_iff_dom_eq_empty

Modification history

2026-10-13 08:04
Mathlib/Data/PFun.lean
feat(Data/PFun): add lemmas for ran, restrict, map, image and preimage (#41830) …
Added PFun.ran_eq_empty_iff_dom_eq_emptyView on Github →