Does topological closure operator distribute over set difference?
131841
Difference of closures and closure of difference
18462
Transitivity check vs. Transitive Closure
138784
Is the differentiation operator an open mapping?
134104
Is there a Cantor-Schroder-Bernstein statement about surjective maps?
152193
The intersection of a closure with an open set
99236
Interior of closure of an open set
88595
Prob. 21, Sec. 17 in Munkres' TOPOLOGY, 2nd ed: Closure and complementation can result in at most 14 different sets
122821
Is the following proof valid? About the closure of a subgroup, of a topological group, being again a subgroup
64633
What is the difference between a 'closure' and a 'lambda'?
144731
Disjoint closed sets in a second countable zero-dimensional space can be separated by a clopen set
56370
Associative operation on a set $S$
13779
Canonical copies of sets
158221
Prob. 4 (a), Sec. 20 in Munkres' Topology, 2nd ed: Are these functions continuous in the product, uniform, and box topologies?
66548
proving topological equivalence
93111
Finiteness of the Algebraic Closure
148213
Given a topological space $X$, why are both $X$ and $\emptyset$ open and closed?
14532
Closure of identity element in a topological group is the intersection of its neighborhood system