Ofir David
Published 2019-07-12Version 1
The local to global property for an equation $\psi$ over a group G asks to show that $\psi$ is solvable in G if and only if it is solvable in every finite quotient of G. In this paper we focus that in order to prove this local to global property for free groups $G=F_k$, it is enough to prove for k less or equal the number of parameters in $\psi$. In particular we use it to show that the local to global property holds for m-powers in free groups.
On quasioutomorphism groups of free groups and their transitivity properties
Algebraic extensions in free groups
Linking of letters and the lower central series of free groups
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