1. Topological Spaces (20/8/2025).
  2. Bases (27/8/2025).
  3. Metrics (3/9/2025).
  4. Interval Topology (17/9/2025).
  5. Disjoint Unions (12/11/2025).

MA 231: Topology

August 2025

Syllabus

Open and closed sets, continuous functions, Metric topology, Product topology, Connectedness and path-connectedness, Compactness, Countability axioms, Separation axioms, Complete metric spaces, Quotient topology, Topological groups, Orbit spaces, Urysohn’s lemma, Metrizability, Baire Category theorem.

Suggested books:

  1. Armstrong, M. A., Basic Topology, Springer (India), 2004.
  2. Munkres, J. R., Topology, Pearson Education, 2005.
  3. Viro, O.Ya., Ivanov, O.A., Netsvetaev, N., and Kharlamov, V.M., Elementary Topology: Problem Textbook, AMS, 2008.

We will mostly follow the book Elementary Topology: Problem Textbook by Viro et. al., which is available online.

Assignments

Assignments will be posted roughly once a week.

  1. Topological Spaces due by Wednesday, Aug 20, 2025.
  2. Bases due by Wednesday, Aug 27, 2025.
  3. Metrics due by Wednesday, Sep 3, 2025.
  4. Interval Topology due by Wednesday, Sep 17, 2025.
  5. Disjoint Unions due by Wednesday, Nov 12, 2025.

Course Details

Additional Resources

This course was taught online in 2021. The lectures are online as are the whiteboards. If you want to printout the whiteboards, please use the compact version.

Note that students are responsible for all the material covered in the lectures this semester, which is likely to be more than that in the above resources. Experience also suggests that offline lectures are more effective. Thus, it is wise to use the above as supplements, not substitutes, for the lectures.

Examinations and Grades

Grades will be based on the assignments, midterm examination and final examinations with the following weightages.

Midterm Examination