Inheritance Anomaly in Concurrent Object Orientation
并发面向对象中的继承反常现象

The combination of concurrency and object orientation is definitely natural except for inheritance. One of the interferences between inheritance and concurrency is inheritance anomaly. Although having been researched extensively, inheritance anomalies are still only vaguely defined and often misunderstood, and no much formal work has been done. A new viewpoint is set forth for understanding inheritance anomalies, in which each subtyping relation has its specific incremental inheritance. Related concepts and definitions are formalized through the language of Category.Some issues are well adapted to distinguish and explin different standpoints about inheritance anomalies,and can serve as guidelines in the modeling of inheritance.