Reading a preprint of Thomas Delzant


This prepublication paper of Thomas Delzant was read in a seminar on (word) hyperbolic groups. The result was a proof that, using Rips & Sela's canonical solutions to triangle equations, one can solve the isomorphism problem of hyperbolic groups (be them with or without torsion).
The article has been, later, retracted by the author.


Seminar presentation, Presented in the Combinatorial group theory course of Olga Kharlampovich, McGill University, Montreal. , 1996-03