English

On the Postnikov towers for real and complex connective K-theory

Algebraic Topology 2012-08-13 v1

Abstract

Complexification, from real connective K-theory to complex connective K-theory, sits in a well-known cofiber sequence between multiplication by eta and a map related to realification. We show how this cofiber sequence factors as one goes up the Postnikov towers of ko and ku. There are 5 distinct cofiber sequences which then repeat under Bott periodicity.

Cite

@article{arxiv.1208.2232,
  title  = {On the Postnikov towers for real and complex connective K-theory},
  author = {Robert R. Bruner},
  journal= {arXiv preprint arXiv:1208.2232},
  year   = {2012}
}
R2 v1 2026-06-21T21:49:04.193Z