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Lindelöf space

American  
[lin-duh-lof, -lawf, -lœf] / ˈlɪn dəˌlɒf, -ˌlɔf, -ˌlœf /

noun

Mathematics.
  1. a topological space having the property that every cover consisting of open sets has a subcover consisting of a countable number of subsets.


Etymology

Origin of Lindelöf space

After Ernst Lindelöf (1870–1946), Finnish topologist