On one ansatz for sl_2-invariant R-matrices

Details On one ansatz for sl_2-invariant R-matrices On one ansatz for sl_2-invariant R-matrices

2006-09-19

arxiv.org/abs/math/0609519v1

Zap.Nauchn.Semin. POMI 335 (2006) 100-118; J.Math.Sciences 143 (2007) 2754-2764 (Engl. transl.)

Mathematics

Quantum Algebra

LaTeX2e, 14 pages

Scientific paper

The spectral decomposition of regular sl_2-invariant R-matrices R(lambda) is studied by means of the method of reduction of the Yang-Baxter equation onto subspaces of a given spin. Restrictions on the possible structure of several highest coefficients in the spectral decomposition are derived. The origin and structure of the exceptional solution in the case of spin s=3 are explained. Analogous analysis is performed for constant R--matrices. In particular, it is shown that the permutation matrix P is a ``rigid'' solution.

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