Theorem IsUltrametricDist.isClosed_ball

Modification history

2024-07-18 14:24
Mathlib/Topology/MetricSpace/Ultra/Basic.lean
feat(MetricSpace/Ultra): IsUltrametricDist and basic facts on open/closed sets in such spaces (#14433) …
Added IsUltrametricDist.isClosed_ballView on Github →