正规几乎PP环

On Normal Almost PP Rings

首先探讨正规几乎PP环的内刻划及左右对称性；其次，研究正规几乎PP环与PP环的关系，最后证明多项式环R［X」是正规几乎PP环当且仅当R是正规几乎PP环．

In this peper,we first chatacterize a normal almost PP ring by the behavior of its elements and show that the normal almost PP ring is left-right symmetric. Then we study the relationship between normal almost PP rings aug PP rings. Finally we prove that the polynomial ring R[x] is a normal almost PP ring if and mily if R is a normal almost PP ring.