Homotopy Type Theory
algebraic formulation of dependent type theory (Rev #2)


The goal of this line of work is to find an essentially algebraic formulation of dependent type theory. This automatically provides free models and quotients. The syntax will then be the initial model.

Rijke’s E-systems are a generalization of Voevodsky’s B-systems.

This line of research should be compared with Dybjer’s categories with families which is a generalized algebraic theory; see categorical model of dependent types for more information.


  • Egbert Rijke, An algebraic formulation of dependent type theory, PDF
  • Vladimir Voevodsky, B-systems, arXiv
  • Vladimir Voevodsky, A C-system defined by a universe in a category, arXiv
  • Vladimir Voevodsky, C-system of a module over a monad on sets, arXiv
  • Vladimir Voevodsky, Subsystems and regular quotients of C-systems, arXiv

Revision on March 15, 2015 at 00:37:33 by Bas Spitters. See the history of this page for a list of all contributions to it.