Geodesic
JSJ DECOMPOSITIONS OF DOUBLES OF FREE GROUPS
Glasgow mathematical journal, Tome 62 (2020) no. 2, pp. 367-382

Voir la notice de l'article provenant de la source Cambridge University Press

We classify all possible JSJ decompositions of doubles of free groups of rank two, and we also compute the Makanin–Razborov diagram of a particular double of a free group and deduce that in general limit groups are not freely subgroup separable. 
HEIL, SIMON. JSJ DECOMPOSITIONS OF DOUBLES OF FREE GROUPS. Glasgow mathematical journal, Tome 62 (2020) no. 2, pp. 367-382. doi: 10.1017/S0017089519000168
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