Geodesic
The problem of the power conjugacy words in a~tree product of free groups with cyclic amalgamation
Fundamentalʹnaâ i prikladnaâ matematika, Tome 22 (2019) no. 4, pp. 29-37.

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We give a positive answer to the problem of power conjugacy words in a tree product of free groups with cyclic amalgamation. It is a generalization of the well-known result obtained by S. Lipschutz for a free product of two free groups with cyclic amalgamation. 
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V. N. Bezverkhnii; E. S. Logacheva. The problem of the power conjugacy words in a~tree product of free groups with cyclic amalgamation. Fundamentalʹnaâ i prikladnaâ matematika, Tome 22 (2019) no. 4, pp. 29-37. http://geodesic.mathdoc.fr/item/FPM_2019_22_4_a2/

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