Different definitions of topological group
63214
Can continuity of inverse be omitted from the definition of topological group?
150796
Subspace topology and order topology (2)
135025
Axiomatization of a Topology using the Boundary
49287
What is $A^-$ in topology?
26256
Characterizing Dense Subgroups of the Reals
70049
Irreducible topological spaces and irreducible Hausdorff space
99689
Zeroth homotopy group: what exactly is it?
91956
Intuition of the meaning of homology groups
50026
Product of compact and closed in topological group is closed
5024
Why do we define quotient groups for normal subgroups only?
8571
Translations in two dimensions - Group theory
158814
Two definitions of locally compact space
95897
Which sets occur as boundaries of other sets in topological spaces?
88285
Intuition for groups
141642
Closure of a certain subset in a compact topological group
113708
Correspondence between Ext group and extensions (from Weibel's book)
152679
Homogeneous topological spaces