[[!redirects resources]] [[!redirects Resources]] Here are some resources. * [[the HoTT book]] * CMU-HoTT Group's [[local activities]]. * [CMU blog](https://cmuhott.wordpress.com/) * [HoTTeST](http://uwo.ca/math/faculty/kapulkin/seminars/hottest.html) HoTT seminar * Leon Chwistek, The Theory of Constructive Types: Principles of Logic and Mathematics, Krakow: University Press, 1925, 98 pp. Extracted from the Annales de la Société Polonaise de Mathématique. (In DjVu format) [Linked from this page, under Bibliography, On logic and mathematics.](http://www.monoskop.org/Leon_Chwistek) * Joyal's [[Categorical Homotopy Type Theory]]