It is known that any strict tensor category (C, I) can determine a strict braided tensor category Z ( C), the centre of C. When A is a finite Hopf algebra, Drinfel’d has proved that Z(AM) is equivale...
Project supported by the National Natural Science Foundation of China.
The notions of class, subclass, superclass and inheritance were first introduced into programming languages by Simula 67, and further developed in languages like Smalltalk and C++ to form a special programming style, ...