Category Theory

To join this course, write to the course instructor, Dr. Amit Kuber

Category theory is an alternative foundation for mathematics and computer science--the usual one being set theory. If taught without examples the course could be very abstract, so we will include lots of examples from areas in which you are interested in. I plan to cover the basic terminology like categories, functors, natural transformations, equivalence of categories, adjoint functors and limits. Then I can direct you to the material using which you can apply category theory to your work. Although there are no formal prerequisites for the course some mathematical maturity is necessary to get an idea of the origins of different concepts in category theory.

Since I finished teaching this course in the last semester the lecture notes for that course are available at the link below:

https://drive.google.com/open?id=1a6doJkxtg5YGXA14tR1i92qhR-B0aIER

Given the mixed background of the participants I do not plan to follow that course linearly but I will tone it down considerably.

Expect that we will continue for over an hour. The sessions will be interactive and I would like to assign some homework for each week. Below are some reference texts but feel free to refer to others not listed here.

  1. Categories for the working mathematician: Saunders MacLane

  2. An introduction to category theory: Harold Simmons

  3. Abstract and concrete categories: The joy of cats by Adamek, Herrlich, Strecker

Category theory regular participants

Lecture 1: Saturday, 1 August 2020, at 4:30pm IST

Basics of categories

Slides: 1, 2, 3

Lecture 2: Saturday, 8 August 2020, at 4:30pm IST

Examples of categories and functors

Slides: 1, 2, 3

Lecture 3: Saturday, 15 August 2020, at 4:30pm IST

Special morphisms, subobjects

Slides: 1, 2, 3

Lecture 4: Saturday, 22 August 2020, at 4:30pm IST

Natural transformations and equivalence of categories

Slides: 1, 2, 3, 4

Lecture 5: Saturday, 29 August 2020, at 4:30pm IST

Limits and colimits

Slides: 1, 2, 3

Lecture 6: Saturday, 5 September 2020, at 4:30pm IST

Adjunctions

Slides: 1, 2

Lecture 7: Saturday, 12 September 2020, at 4:30pm IST

Yoneda lemma, Cartesian closed categories and Elementary toposes

Slides: 1, 2