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Infinite, finitely generated linear group has indices of subgroups divisible by infinitely many primes
This question was previously asked at Math.SE, but didn't receive much attention.
Let $G$ be an infinite finitely generated group and suppose that $G$ is linear, say $G \leq \operatorname{GL}_n(K)$ ...
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Generalisation of the Liouville function as irreducible representations for the semigroup ($\mathbb{N},\cdot)$?
This is a duplicate of a question I have asked at here at math stack exchange, but I thought it could be also here of interest.
When looking at the [Liouville function] (https://en.wikipedia.org/wiki/...
