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katie
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Bound on the order of a finite group generated by elements $a$ and $b$ of order 2 and $n \geq 3$ such that the sum of the images of $a$, $b$ and $b^{-1}$ under any ordinary representation has only rational eigenvalues

rt.representation-theory gr.group-theory sp.spectral-theory
answered Jun 9, 2013 at 7:34
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