Poove

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Name	Poove
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Suppose $\Gamma_m$ is a principal congruence subgroup of level m contained in a finite index subgroup $\Gamma$ of $SL(n,\mathbb Z)$. Is $\Gamma_m$ characteristic in $\Gamma$?

gr.group-theory

sep 16 11 at 19:17 Poove 195●5