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Theorem metric.closed_ball_eq_empty_iff_neg

Modification history

2021-08-21 19:52
src/topology/metric_space/basic.lean
feat(topology/metric_space): turn `nonempty_ball` into an `iff` (#8747) …
Deleted metric.closed_ball_eq_empty_iff_negView on Github →
2020-05-19 09:58
src/topology/metric_space/basic.lean
feat(analysis/normed_space): interior of `closed_ball` etc (#2723) …
Added metric.closed_ball_eq_empty_iff_negView on Github →