Mathlib v3 is deprecated. Go to Mathlib v4

Theorem homeomorph.opens_congr_symm

Modification history

2023-02-09 19:18
src/topology/sets/opens.lean
refactor(topology/sets/opens): use a `structure` for `opens` and `open_nhds_of` (#18409) …
Added homeomorph.opens_congr_symmView on Github →