### What is Applied Category Theory?

#### Posted by John Baez

Tai-Danae Bradley has a new free book:

- Tai-Danae Bradley,
*What is Applied Category Theory?*

Abstract.This is a collection of introductory, expository notes on applied category theory, inspired by the 2018 Applied Category Theory Workshop, and in these notes we take a leisurely stroll through two themes (functorial semantics and compositionality), two constructions (monoidal categories and decorated cospans) and two examples (chemical reaction networks and natural language processing) within the field.

This book grew out of the workshop Applied Category Theory 2018, which she attended. I think it makes a great complement to Fong and Spivak’s *Seven Sketches* and my online course.

Check it out!

Posted at September 18, 2018 7:44 PM UTC
## Re: What is Applied Category Theory?

This is really good! I especially like the explanation of functorial semantics.

We definitely need more of this, people out there need to know what we are doing :)