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math.QA1998
From the Tetrahedron Equation to Universal R-Matrices
R. M. Kashaev, A. Yu. Volkov
Modified universal R-matrices, associated with the central extension (through the Drinfeld's double construction) of the quantum groups U_q(sl_n), are realized through an infinite…
hep-th1998
Liouville central charge in quantum Teichmuller theory
R. M. Kashaev
In the quantum Teichmuller theory, based on Penner coordinates, the mapping class groups of punctured surfaces are represented projectively. The case of a genus three surface with…