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Additional
closed set
English Wikipedia - The Free Encyclopedia
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Closed set
In
geometry
,
topology
, and related branches of
mathematics
, a
closed set
is a
set
whose
complement
is an
open set
. In a
topological space
, a closed set can be defined as a set which contains all its
limit points
. In a
complete metric space
, a closed set is a set which is
closed
under the
limit
operation.
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