设H是一个具有对合对极的有限维弱Hopf代数,文中首先给出双边余模代数的定义,接着给出了对角交叉积的概念,使Drinfeld double是一......

The notions of u-quasi-Hopf algebras and the quantum dimensioa dimu M of a representation M by u are introduced. It is s......