English

Convergence of two obstructions for projective modules

Commutative Algebra 2023-10-04 v2

Abstract

Let X=SpecAX=Spec{A} denote a regular affine scheme, over a field kk, with 1/2k1/2\in k and dimX=d\dim X=d. Let PP denote a projective AA-module of rank n2n\geq 2. Let π0(LO(P))\pi_0\left({\mathcal LO}(P)\right) denote the (Nori) Homotopy Obstruction set, and CH~n(X,ΛnP)\widetilde{CH}^n\left(X, \Lambda^nP\right) denote the Chow Witt group. In this article, we define a natural (set theoretic) map} ΘP:π0(LO(P))CH~n(X,ΛnP) \Theta_P: \pi_0\left({\mathcal LO}(P)\right) \longrightarrow \widetilde{CH}^n\left(X, \Lambda^nP\right) The main Results are included in my recently published book on Algebraic KK-Theory.

Keywords

Cite

@article{arxiv.2001.09561,
  title  = {Convergence of two obstructions for projective modules},
  author = {Satya Mandal},
  journal= {arXiv preprint arXiv:2001.09561},
  year   = {2023}
}
R2 v1 2026-06-23T13:21:08.497Z