Intuitive description of what a topological space is?!
28766
Intuition behind topological spaces
21740
Reference for general-topology
60236
What is the difference between topological and metric spaces?
95897
Which sets occur as boundaries of other sets in topological spaces?
81873
Is $(X,\mathcal T)$ necessarily an indiscrete space?
130361
Basis for a topology with a countable number of sets
146261
Difference between topology and sigma-algebra axioms.
83159
Defining a metric space
157578
perfect map in topology
47602
Convergence of Sets? (Topology on a Powerset of a Set?)
66239
Verifying that a certain collection of intervals of $\mathbb R$ forms a topology
94246
Category-theoretic limit related to topological limit?
7678
Show "countable complement topology" is a topology
81999
What is this quotient space?
152679
Homogeneous topological spaces
72190
Topological proof on discrete topology where $X$ is infinite
150796
Subspace topology and order topology (2)