This research was supported by the Natural Science Foundation of Zhejiang Province (LY13A010019), China.
An ideal I of a ring R is strongly separative provided that for all finitely generated projective R-modules A, B with A = AI and B = BI, if 2A ≌ A + B, then A ≌ B. We prove in this paper that a regular ideal I of a...
Supported by the Natural Science Foundation of Zhejiang Province(LY13A010019)
定义了weakly almost clean环.交换环R叫做weakly almost clean环,如果对于任意一个元素x∈R可以写成x=r+e或x=r-e的形式,其中r∈reg(R)且e∈Id(R).首先,对于环Ri的非空集合{Ri},证明了直和R=∏i∈IRi为weakly almost clean当且仅当存在...
The research of the author was supported by the Natural Science Foundation of Zhejiang Province (LY13A010019) and the Fund of Hangzhou Normal University, China.
We get criteria of strong cleanness for several classes of 2 × 2 matrices over integers. For commutative local domains, we establish ones in terms of solvability of quadratic equations. Strongly clean matrices over p...