摘要
In this paper, we give a sufficient condition for double crossproduct X A to be X A for some skew pairing T if X A is a 2-cocycle deformation of X A. Then we give a sufficient and necessary condition for X A to be X A by using natural isomorphism terminology.
In this paper, we give a sufficient condition for double crossproduct X A to be X A for some skew pairing T if X A is a 2-cocycle deformation of X A. Then we give a sufficient and necessary condition for X A to be X A by using natural isomorphism terminology.
基金
Supported by Chinese Natural Science Fund
