环尺具有P稳定度是指若有aR+6R=R,则存在Y∈P(R)使得a+by是尺中的可逆元.其中P(R)是环R的子集并满足如下性质:对于任意的可逆元u和P∈P(R)都有up,pu∈P(R).通过对环尺的研究,统一了关于具有可逆-1稳定度、(5,2)-稳定度、弱可逆-1稳定度和稳定度为1的环的一些已知结果.当环的一个元素是一个可逆元和一个正则元之和,则称这个元素为UR。如果环尺具有P稳定度且P(R)是环中所有UR元素组成的集合,则称环R具有UR-稳定度.研究了该环的性质,并证明了如果尺具有UR-稳定度,则尺上的任意n阶矩阵环也具有UR-稳定度.
A ring R is said to be satisfying P-stable range provided that whenever aR + bR = R, there exists y ∈ P(R) such that a + by is a unit of R, where P(R) is the subset of R which satisfies the property that up, pu∈ P(R) for every unit u of R and p ∈P(R). By studying this ring, some known results of rings satisfying unit-1 stable range, ( S, 2) -stable range, weakly unit 1- stable range and stable range one are unified. An element of a ring is said to be UR if it is the sum of a unit and a regular dement and a ring is said to be satisfying UR-stable range if R has P-stable range and P(R) is the set of all UR-elements of R, Some properties of this ring are studied and it is proven that if R satisfies UR-stahle range then so does any n × n matrix ring over R.