Twisted Iwasawa invariants of knots

Ryoto Tange, Jun Ueki

Published 2022-03-07Version 1

Let $p$ be a prime number and $m$ an integer coprime to $p$. In the spirit of arithmetic topology, we introduce the notions of the twisted Iwasawa invariants $\lambda, \mu, \nu$ of ${\rm GL}_N$-representations and $\mathbb{Z}/m\mathbb{Z}\times \mathbb{Z}_p$-covers of knots. We prove among other things that the set of Iwasawa invariants determine the genus and the fiberedness of a knot, yielding their profinite rigidity. Several intuitive examples are attached. We further prove the $\mu=0$ theorem for ${\rm SL}_2$-representations of twist knot groups and give some remarks.