## Wang Shuanhong, Wang Dingguo

*Hopf algebra structure $H^{\sigma -R}$ with two sided invertible 2-cocycle *

Comment.Math.Univ.Carolinae 40,4 (1999) 635-650. **Abstract:**In this paper, we study the $H^{\sigma -R}$ type Hopf algebras and present its braided and quasitriangular Hopf algebra structure. This generalizes well-known results on $H^{\sigma }$ and $H^R$ type Hopf algebras. Finally, the classification of $H^{\sigma -R}$ type Hopf algebras is given.

**Keywords:** Hopf algebra, $2$-cocycle, braided Hopf algebra

**AMS Subject Classification:** 16W30

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