On constant U_q(sl_2)-invariant R-matrices

Abstract

The spectral resolution of a U_q(sl_2)-invariant solution R of the constant Yang-Baxter equation in the braid group form is considered. It is shown that, if the two highest coefficients in this resolution are not equal, then R is either the Drinfeld R-matrix or its inverse.

arXiv commentLaTeX, 7 pages.