Theorem isOpen_iff_mem_nhds

Modification history

2024-01-26 03:44
Mathlib/Topology/Basic.lean
chore(Topology/Basic): re-use variables; rename a : X to x : X (#9993)
Modified isOpen_iff_mem_nhdsView on Github →
2024-01-24 10:41
Mathlib/Topology/Basic.lean
chore(Topology/Basic): rename variables (#9956) …
Modified isOpen_iff_mem_nhdsView on Github →
2023-01-26 08:19
Mathlib/Topology/Basic.lean
feat: port Topology.Basic (#1826)
Added isOpen_iff_mem_nhdsView on Github →