Coalgebras and quantization
arXiv:math-ph/0506062
Abstract
Two coalgebra structures are used in quantum field theory. The first one is the coalgebra part of a Hopf algebra leading to deformation quantization. The second one is a co-module co-algebra over the first Hopf algebra and it is used to define connected chronological products and renormalization.
3 pages. Paper written for the Encyclopaedia of Mathematics