Mathlib v3 is deprecated. Go to Mathlib v4

Theorem lower_semicontinuous_on.lower_semicontinuous_within_at

Modification history

2021-05-27 00:46
src/topology/semicontinuous.lean
feat(topology/semicontinuous): basics on lower and upper semicontinuous functions (#7693) …
Added lower_semicontinuous_on.lower_semicontinuous_within_atView on Github →