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arxiv: math/0501369 · v3 · submitted 2005-01-22 · 🧮 math.QA · math-ph· math.MP

Semi-classical twists for sl(3) and sl(4) boundary r-matrices of Cremmer-Gervais type

classification 🧮 math.QA math-phmath.MP
keywords r-matricesboundarycremmer-gervaissemi-classicaltwiststypecoalgebraiccorresponding
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We obtain explicit formulas for the semi-classical twists deforming the coalgebraic structure of U(sl(3)) and U(sl(4)). In rank 2 and 3 the corresponding universal R-matrices quantize the boundary r-matrices of Cremmer-Gervais type defining Lie Frobenius structures on the maximal parabolic subalgebras in sl(n).

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