Learn (applied) category theory

Books, lecture notes, articles

Courses, workshops, videos

For those with no university math training

  • The book “The Joy of Abstraction” by Eugenia Cheng gives a very accessible introduction to category theory which explains key conceptual ideas and provides a rigorous formal treatment. There was a book club where Eugenia answered readers’ questions about each chapter, and see also this author interview.

Other online resources

  • The n-Category Cafe blog
  • John Baez’s blog (an eclectic mix of topics, but lots on applied category theory, too).
  • Annoying Precision (blog on math in general, and contains various posts on category theory).
  • n-Lab (Warning! this is not designed primarly as a teaching or reference resource; it is researchers’ notes. Not always accessible, balanced/representative, or pedagogical .)