The Grigorcuk Group solvable?

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The description of the Grigorcuk Group is given here https://en.wikipedia.org/wiki/Grigorchuk_group. Is this group Solvable?

Thanks for any help.

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This is definitely not the most straightforward solution, but it makes use of the Grigorchuk group's most famous property: having intermediate growth.

In this paper Wolf (1968), building on a previous result by Milnor, proves that:

A finitely generated solvable group, either is polycyclic and has a nilpotent subgroup of finite index and is thus of polynomial growth, or has no nilpotent subgroup of finite index and is of exponential growth.

Therefore, if the Grigorchuk group were solvable, it could not have intermediate growth.