English

Toda brackets in n-angulated categories

Category Theory 2023-12-21 v1 Algebraic Topology Representation Theory

Abstract

We introduce Toda brackets for n-angulated categories and show that the various definitions of Toda brackets coincide. We prove juggling formulas for these Toda brackets generalizing the triangulated case. Following that, we generalize a theorem due to Heller in the triangulated setting to the setting of n-angulated categories. We also provide several examples of computing Toda brackets for n-angulated categories. Finally, for an n-angulated category sitting in a triangulated category as in the setup of Geiss, Keller and Oppermann, we show that Toda brackets in the n-angulated sense coincide with n-fold Toda brackets in the triangulated sense up to an explicit sign.

Keywords

Cite

@article{arxiv.2312.13209,
  title  = {Toda brackets in n-angulated categories},
  author = {Martin Frankland and Sebastian H. Martensen and Marius Thaule},
  journal= {arXiv preprint arXiv:2312.13209},
  year   = {2023}
}
R2 v1 2026-06-28T13:57:48.644Z