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Reidemeister numbers of saturated weakly branch groups

Alexander Fel'shtyn, Yuriy Leonov, Evgenij Troitsky

math.GRarXiv:math/0606725

Abstract

We prove for a wide class of saturated weakly branch group (including the (first) Grigorchuk group and the Gupta-Sidki group) that the Reidemeister number of any automorphism is infinite.

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