Timeline for Finite group such that $K_{-1} (\mathbb Z G)$ has non-trivial torsion

6 events

when toggle format	what		by	license	comment
Dec 7, 2020 at 11:59	comment	added	Georg Lehner		This yields as the smallest example the group $Q_4$ with 16 elements, with $K_{−1}\mathbb Z Q_4 = \mathbb Z_2$. As a further remark, the point of this paper for the author was to calculate negative $K$-theory for finite subgroups of $SL_1(\mathbb H)$, so it would be interesting to understand how non-trivial torsion is linked to quarternionic representations.
Dec 3, 2020 at 17:46	vote	accept	Georg Lehner
Dec 3, 2020 at 17:39	history	edited	Francesco Polizzi	CC BY-SA 4.0	added 19 characters in body
Dec 3, 2020 at 15:57	history	edited	Francesco Polizzi	CC BY-SA 4.0	added 2 characters in body
Dec 3, 2020 at 15:16	history	edited	Francesco Polizzi	CC BY-SA 4.0	added 198 characters in body
Dec 3, 2020 at 15:09	history	answered	Francesco Polizzi	CC BY-SA 4.0