Theorem isClosed_sUnion

Modification history

2025-08-22 14:10
Mathlib/Topology/AlexandrovDiscrete.lean
feat: Finite product of Alexandrov-discrete spaces is Alexandrov-discrete (#27018)
Modified isClosed_sUnionView on Github →
2023-09-05 23:13
Mathlib/Topology/AlexandrovDiscrete.lean
feat: Alexandrov-discrete spaces (#6962) …
Added isClosed_sUnionView on Github →