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Theorem
is_closed.mem_iff_inf_dist_zero
Modification history
2021-10-05 21:57
src/topology/metric_space/hausdorff_distance.lean
feat(topology/bases): a family of nonempty disjoint open sets is countable in a separable space (#9557) …
Added
is_closed.mem_iff_inf_dist_zero
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