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Theorem is_open_map_sum

Modification history

2022-09-19 07:18
src/topology/constructions.lean
refactor(topology/constructions): golf, add `@[simp]`/`iff` variants (#16539)
Modified is_open_map_sumView on Github →
2020-05-31 01:56
src/topology/constructions.lean
feat(topology/homeomorph): sum_prod_distrib (#2870) …
Added is_open_map_sumView on Github →