Commit 2024-01-11 10:24 33a5585b
View on Github →feat: two lemmas about partial homeomorphisms (#9623) From sphere-eversion. While I'm in the area,
- remove
image_isOpen_of_isOpen
, which is an exact duplicate ofisOpen_image_of_subset_source
- rename
image_isOpen_of_isOpen'
toisOpen_image_source_inter_of_isOpen
(which matches the naming convention) - move
isOpen_inter_preimage_symm
next to its adjacent lemmas