Fréchet–Urysohn space
Property of topological space / From Wikipedia, the free encyclopedia
In the field of topology, a Fréchet–Urysohn space is a topological space with the property that for every subset
the closure of
in
is identical to the sequential closure of
in
Fréchet–Urysohn spaces are a special type of sequential space.
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The property is named after Maurice Fréchet and Pavel Urysohn.