研究右完备的Abel范畴上的右平凡扩张,得出右完备范畴的平凡扩张范畴也是右完备范畴,并证明了范畴的平凡扩张与极限的交换性.
Studies the right extension of the right-complete Abelian categories, then con-firms the truth that the trivial extension of a right-complete category is still a right'complete category, and proves the exchange property between trivial extension and limit.