English

Beta families arising from a $v_2^9$ self map on $S/(3,v_1^8)$

Algebraic Topology 2023-11-29 v2

Abstract

We show that v29v_2^9 is a permanent cycle in the 3-primary Adams-Novikov spectral sequence computing π(S/(3,v18))\pi_*(S/(3,v_1^8)), and use this to conclude that the families β9t+3/i\beta_{9t+3/i} for i=1,2i=1,2, β9t+6/i\beta_{9t+6/i} for i=1,2,3i=1,2,3, β9t+9/i\beta_{9t+9/i} for i=1,,8i=1,\dots,8, α1β9t+3/3\alpha_1\beta_{9t+3/3}, and α1β9t+7\alpha_1\beta_{9t+7} are permanent cycles in the 3-primary Adams-Novikov spectral sequence for the sphere for all t0t\geq 0. We use a computer program by Wang to determine the additive and partial multiplicative structure of the Adams-Novikov E2E_2 page for the sphere in relevant degrees. The i=1i=1 cases recover previously known results of Behrens-Pemmaraju and the second author. The results about β9t+3/3\beta_{9t+3/3}, β9t+6/3\beta_{9t+6/3} and β9t+8/9\beta_{9t+8/9} were previously claimed by the second author; the computer calculations allow us to give a more direct proof. As an application, we determine the image of the Hurewicz map πSπtmf\pi_*S \to \pi_*tmf at p=3p=3.

Keywords

Cite

@article{arxiv.2109.01059,
  title  = {Beta families arising from a $v_2^9$ self map on $S/(3,v_1^8)$},
  author = {Eva Belmont and Katsumi Shimomura},
  journal= {arXiv preprint arXiv:2109.01059},
  year   = {2023}
}

Comments

Version to appear in A&GT