Let $q=p^f$, $r$ be a primitive prime divisor of $p^f-1$, i.e., $r\mid p^f-1$ but $r\nmid p^j-1$ for $j
How small can a $\mathcal{C}_1$ subgroup of $PSL_2(q)$ containing elements of certain prime orders be?
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group-theory
finite-groups
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0Thanks! That's exactly the proof I'm looking for. – 2012-10-17