摘要The author constructs the Casimir element of Hall algebras. By the method of Gabber-Kac theorem (see [4]), it is proved that the Serre relations are the defining relations in composition algebra.
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7Zheng-xin CHEN & Ya-nan LIN School of Mathematics and Computer Science, Pujian Normal University, Fuzhou 350007, China,School of Mathematical Sciences, Xiamen University, Xiamen 361005, China.Tubular algebras and affine Kac-Moody algebras[J].Science China Mathematics,2007,50(4):521-532. 被引量:2