English

A construction of some objects in many base cases of an Ausoni-Rognes conjecture

Algebraic Topology 2020-12-15 v3 K-Theory and Homology

Abstract

Let pp be a prime, n1n \geq 1, K(n)K(n) the nnth Morava KK-theory spectrum, Gn\mathbb{G}_n the extended Morava stabilizer group, and K(A)K(A) the algebraic KK-theory spectrum of a commutative SS-algebra AA. For a type n+1n+1 complex VnV_n, Ausoni and Rognes conjectured that (a) the unit map in:LK(n)(S0)Eni_n: L_{K(n)}(S^0) \to E_n from the K(n)K(n)-local sphere to the Lubin-Tate spectrum induces a map K(LK(n)(S0))vn+11Vn(K(En))hGnvn+11VnK(L_{K(n)}(S^0)) \wedge v_{n+1}^{-1}V_n \to (K(E_n))^{h\mathbb{G}_n} \wedge v_{n+1}^{-1}V_n that is a weak equivalence, where (b) since Gn\mathbb{G}_n is profinite, (K(En))hGn(K(E_n))^{h\mathbb{G}_n} denotes a continuous homotopy fixed point spectrum, and (c) π()\pi_\ast(-) of the target of the above map is the abutment of a homotopy fixed point spectral sequence. For n=1n = 1, p5p \geq 5, and V1=V(1)V_1 = V(1), we give a way to realize the above map and (c), by proving that i1i_1 induces a map K(LK(1)(S0))v21V1(K(E1)v21V1)hG1,K(L_{K(1)}(S^0)) \wedge v_{2}^{-1}V_1 \to (K(E_1) \wedge v_{2}^{-1}V_1)^{h\mathbb{G}_1}, where the target of this map is a continuous homotopy fixed point spectrum, with an associated homotopy fixed point spectral sequence. Also, we prove that there is an equivalence (K(E1)v21V1)hG1(K(E1))h~G1v21V1,(K(E_1) \wedge v_{2}^{-1}V_1)^{h\mathbb{G}_1} \simeq (K(E_1))^{\widetilde{h}\mathbb{G}_1} \wedge v_2^{-1}V_1, where (K(E1))h~G1(K(E_1))^{\widetilde{h}\mathbb{G}_1} is the homotopy fixed points with G1\mathbb{G}_1 regarded as a discrete group.

Keywords

Cite

@article{arxiv.2005.04190,
  title  = {A construction of some objects in many base cases of an Ausoni-Rognes conjecture},
  author = {Daniel G. Davis},
  journal= {arXiv preprint arXiv:2005.04190},
  year   = {2020}
}

Comments

32 pages; submitted for publication; updated description of status of $(K(E_n))^{h\mathbb{G}_n}$ by adding Remark 1.5 and modifying the paragraph that precedes it (and removing description of status from abstract); sharpened the writing in various places