一类32维半单Hopf代数的拟三角结构

    Quasitriangular Structure for a Class of 32-dimension Semisimple Hopf Algebra

    • 摘要: Kac和Paljutkin构造了一类非交换非余可换的半单Hopf代数K8,后来Masuoka用提升方法重新构造了这类代数.Ore扩张方法是构造新的非交换非余可换Hopf代数的一类很重要的方法,通过它可以得到许多有意义的量子代数.人们用Ore扩张方法构造了更为广泛的非交换非余可换半单Hopf代数H2n2,其余代数乘法由Drinfeld扭元及代数自同构所确定.推广了Hopf代数K8,首先给出一类32维非交换非余可换的半单Hopf代数H32的定义,此类Hopf代数可以通过给定域上的Abel群代数KC4×C4利用特殊的Ore扩张得到,它有一个子Hopf代数,恰好同构于8维非交换非余交换的唯一的半单Hopf代数K8.然后,主要研究Hopf代数H32的拟三角性.通过详细计算,精确地得到Hopf代数H32的所有泛R-矩阵,结合Wakui得出的结论,得知H8为极小拟三角,而H32非极小拟三角.

       

      Abstract: Kac and Paljutkin constructed a class of non-commutative and non-cocommutative semisimple Hopf algebra K8, then Masuoka reconstructed this algebra by lifting method. Ore extension is an important method to construct new examples of neither commutative nor cocommutative Hopf algebras. Many interesting quantum algebras can be obtained in this way. More extensive non-commutative and non-cocommutative semisimple Hopf algebra H2n2 was constructed by means of Ore extension. Its coalgebraic multiplication was determined by the Drinfeld twist element and some algebraic automorphism. In this paper, the definition of a class of non-commutative and non-cocommutative semisimple Hopf algebra H32of dimension 32 was given, which can be obtained by the special Ore extension for the given KC4×C4 of Abel group algebras of order 16. It has a sub-Hopf algebra of dimension 8, which is just isomorphic to the unique neither commutative nor cocommutative semisimple 8-dimension Hopf algebra K8. Then, the main task was to study the quasitriangular structure of the Hopf algebra H32. Through detailed calculation, all the universal R-matrices for this class of Hopf algebras were given. Combining with Wakui's conclution, we know that H8 is a minimal quasitriangular Hopf algebra; however, H32 is not.

       

    /

    返回文章
    返回