English

Prisms and Tambara functors I: Twisted powers, transversality, and the perfect sandwich

Number Theory 2023-09-12 v2 Algebraic Topology

Abstract

We construct a faithful and conservative functor from prisms to CpC_{p^\infty}-Tambara functors; in appropriate situations, this gives an algebraic description of π0TC\underline\pi_0{\mathrm{TC}^-}. We also present two integral variants using the generalized nn-series of Devalapurkar-Misterka. The construction is based on the "twisted II-adic" or "(p)q(p^\bullet)_q" filtration, and is closely related to qq-divided powers. To verify the axioms, we introduce a new technique for constructing Tambara functors, inspired by transversal prisms. We apply this to give a conceptual construction of Molokov's de Rham-Witt comparison map, and generalize it to a triangle sandwiching prismatic theory between theories built from Witt vectors and adjunction of pp-power roots.

Keywords

Cite

@article{arxiv.2309.03181,
  title  = {Prisms and Tambara functors I: Twisted powers, transversality, and the perfect sandwich},
  author = {Yuri J. F. Sulyma},
  journal= {arXiv preprint arXiv:2309.03181},
  year   = {2023}
}

Comments

32 pages; v2: fix typos and add/expand some remarks