MathSciNet bibliographic data MR1653061 17B35 (06A07 16S30 17B10) Benkart, Georgia Down-up algebras and Witten's deformations of the universal enveloping algebra of \$\germ s\germ l_2\$$\germ s\germ l_2$. Recent progress in algebra (Taejon/Seoul, 1997), 29–45, Contemp. Math., 224, Amer. Math. Soc., Providence, RI, 1999. Article

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