OAI/Analysis/CircleDomains/Topology/DisjointClosedNeighborhoods.lean
1 declarations, 0 contain sorry, 0 declared as axioms
Finite disjoint closed sets have disjoint closed neighborhoods subordinate to individually prescribed open sets.
- lemma
OAI.CircleDomainRigidity.finite_disjoint_closed_neighborhoodsline 12