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How many times is each alternating group a hurwitz quotient? In other words, how many non-isomorphic ways can an alternating group be generated by an element of order 2 and an element of order 3 whose product has order 7? Specifically, how many times do $ A_{15}$ , $ A_{21}$ , $ A_{22}$ , $Read more

Let $ G$ be a locally compact group and $ \Gamma$ a lattice in $ G$ . For an irreducible unitary representation $ \pi$ of $ G$ let $ $ m_\Gamma(\pi)=\dim\mathrm{Hom}_G(\pi,L^2(\Gamma\backslash G)) $ $ be its automorphic multiplicity. In [1], Chapter 3 one finds that $ m_\Gamma(\pi)$ is finite if $ G$ is a reductiveRead more