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On the toplogical computation of K4 of t...
Sikiric, Mathieu Dut...
On the toplogical computation of K4 of the Gaussian and Eisenstein integers by Sikiric, Mathieu Dutour ( Author )
Australian National University
06-09-2023
In this paper we use topological tools to investigate the structure of the algebraic K-groups K_4 (Z[i]) and K_4 (Z[rho]), where i := sqrt{-1} and rho := (1+sqrt{-3})/2. We exploit the close connection between homology groups of GL_n(R) for n <= 5 and those of related classifying spaces, then compute the former using Voronoi's reduction theory of positive definite quadratic and Hermitian forms to produce a very large finite cell complex on which GL_n(R) acts. Our main result is that K_4 (Z[i]) and K_4 (Z[rho]) have no p-torsion for p >= 5.
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English
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MYR 0.01
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http://arxiv.org/abs/1411.0584
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