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IsUltrametricDist.isOpen_closedBall
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2024-07-18 14:24
Mathlib/Topology/MetricSpace/Ultra/Basic.lean
feat(MetricSpace/Ultra): IsUltrametricDist and basic facts on open/closed sets in such spaces (#14433) …
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IsUltrametricDist.isOpen_closedBall
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