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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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Locally_closed_subset entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-09-02 and was most recently seen on 2026-09-02.
In topology, a branch of mathematics, a subset of a topological space is said to be locally closed if any of the following equivalent conditions are satisfied: is the intersection of an open set and a closed set in
For each point there is a neighborhood of such that is closed in
is open in its closure
The set is closed in
is the difference of two closed sets in
is the difference of two open sets in
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