Steenrod operations via higher Bruhat orders
Algebraic Topology
2025-02-07 v4 Combinatorics
Abstract
The purpose of this paper is to establish a correspondence between the higher Bruhat orders of Yu. I. Manin and V. Schechtman, and the cup- coproducts defining Steenrod squares in cohomology. To any element of the higher Bruhat orders we associate a coproduct, recovering Steenrod's original ones from extremal elements in these orders. Defining this correspondence involves interpreting the coproducts geometrically in terms of zonotopal tilings, which allows us to give conceptual proofs of their properties and show that all reasonable coproducts arise from our construction.
Keywords
Cite
@article{arxiv.2309.16481,
title = {Steenrod operations via higher Bruhat orders},
author = {Guillaume Laplante-Anfossi and Nicholas J. Williams},
journal= {arXiv preprint arXiv:2309.16481},
year = {2025}
}
Comments
33 pages, 3 figures. Accepted in Proc. Lond. Math. Soc