English

Homology pro stability for Tor-unital pro rings

K-Theory and Homology 2017-10-17 v2

Abstract

Let {Am}\{A_m\} be a pro system of associative commutative, not necessarily unital, rings. Assume that the pro systems {ToriZAm(Z,Z)}m\{\mathrm{Tor}^{\mathbb{Z}\ltimes A_m}_i(\mathbb{Z},\mathbb{Z})\}_m vanish for all i>0i>0. Then we prove that the sequence {Hl(GLn(Am))}m{Hl(GLn+1(Am))}m{Hl(GLn+2(Am)}m \{H_l(\mathrm{GL}_n(A_m))\}_m \to \{H_l(\mathrm{GL}_{n+1}(A_m))\}_m \to \{H_l(\mathrm{GL}_{n+2}(A_m)\}_m \to \cdots stabilizes up to pro isomorphisms for nn large enough than ll and the stable range of AmA_m's.

Keywords

Cite

@article{arxiv.1610.04998,
  title  = {Homology pro stability for Tor-unital pro rings},
  author = {Ryomei Iwasa},
  journal= {arXiv preprint arXiv:1610.04998},
  year   = {2017}
}

Comments

v2: simplified the exposition, removed Appendix A, which had contained unclear points, 28pages