Boundary solutions of the quantum Yang-Baxter equation and solutions in three dimensions

Abstract

Boundary solutions to the quantum Yang-Baxter (qYB) equation are defined to be those in the boundary of (but not in) the variety of solutions to the ``modified'' qYB equation, the latter being analogous to the modified classical Yang-Baxter (cYB) equation. We construct, for a large class of solutions $r$ to the modified cYB equation, explicit ``boundary quantizations'', i.e., boundary solutions to the qYB equation of the form $I+tr+t^2{r}_2+...$. In the last section we list and give quantizations for all classical r-matrices in $sl(3)\wedge sl(3)$.

9 pages, AMS-LaTeX

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