Witt vectors and truncation posets
arXiv:1409.4156
Abstract
One way to define Witt vectors starts with a truncation poset . We generalize Witt vectors to truncation posets, and show how three types of maps of truncation posets can be used to encode the following six structure maps on Witt vectors: addition, multiplication, restriction, Frobenius, Verschiebung and norm.
To appear in Theory and Applications of Categories