Mathematics – Quantum Algebra
Scientific paper
2003-06-26
J.Operator Theory 54:1 (2005), 27-68
Mathematics
Quantum Algebra
44 pages, Latex, an appendix is added to the version published in J.O.T. . A new construction of the factors on which two dual
Scientific paper
Let N_0 \subset N_1 a depth 2, finite index inclusion of type II1 factors and N_0 \subset N_1 \subset N_2 \subset N_3 ... the corresponding Jones tower. D. Nikshych et L. Vainerman built dual structures of quantum C*-groupoid on the relative commutants N'_0 \cap N_2 et N'_1 \cap N_3. Here I define a new duality which allows a symetric construction without changing the involution. So the Temperley-Lieb algebras are selfdual quantum C*-groupoids and the quantum C*-groupoids associated to a finite depth finite index inclusion can be choosen selfdual. I show that every finite-dimensional connexe quantum C*-groupoid acts outerly on the type II1 hyperfinite factor. In the light of this particular case, I propose a deformation of any finite quantum C*-groupoid to an regular finite quantum C*-groupoid. In the appendix, a new construction of the factors on which two dual regular finite quantum C*-groupoids act is given. The finite quantum C*-groupoids obtained from the built tower are isomorphic to the initial ones.
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