探讨预加范畴A与它的右平凡扩张范畴A∝F之间的关系,得到A是Abel范畴(完全范畴、半完全范畴)当且仅当A∝F是Abel范畴(完全范畴、半完全范畴),并应用到环上,得到环的相应结论.
Discusses the relationship between pre-addictive category A and its trivial extension categoryA∝F,then puts forward that: A is abelian(perfect categories,semiperfect categories) if and only if A∝ F is abelian(perfect categories,semiperfect categories).Furthermore,apply the results to rings and get the relevant results.