In mathematics, general topology or point set topology is that branch of topology which studies elementary properties of topological spaces and structures defined on them. Other main branches of topology are algebraic topology and differential topology.
It's in general topology that basic notions, such as:
- open and closed sets;
- compact spaces;
- continuous functions;
- convergence of sequences, netss, and filterss
- separation axioms
Some standard books on general topology include:
Standard references