Let R be a ring and J(R) the Jacobson radical. An element a of R is called(strongly) J-clean if there is an idempotent e ∈ R and w ∈ J(R) such that a = e + w(and ew = we). The ring R is called a(strongly)...Let R be a ring and J(R) the Jacobson radical. An element a of R is called(strongly) J-clean if there is an idempotent e ∈ R and w ∈ J(R) such that a = e + w(and ew = we). The ring R is called a(strongly) J-clean ring provided that every one of its elements is(strongly) J-clean. We discuss, in the present paper,some properties of J-clean rings and strongly J-clean rings. Moreover, we investigate J-cleanness and strongly J-cleanness of generalized matrix rings. Some known results are also extended.展开更多
引入幂级数J-Armendariz环的概念,进一步扩展幂级数Armendariz环的研究。证明了:(1)设T=(R 0 M S)是一个形式三角矩阵环,则T是幂级数J-Armendariz环当且仅当R和S都是是幂级数J-Armendariz环;(2)设{R_αα∈Λ}是一族环,则直积∏α∈ΛR...引入幂级数J-Armendariz环的概念,进一步扩展幂级数Armendariz环的研究。证明了:(1)设T=(R 0 M S)是一个形式三角矩阵环,则T是幂级数J-Armendariz环当且仅当R和S都是是幂级数J-Armendariz环;(2)设{R_αα∈Λ}是一族环,则直积∏α∈ΛR_α是幂级数J-Armendariz环当且仅当每一个环R_α都是幂级数J-Armendariz环;(3)如果环R是幂级数J-Armendariz环,满足J(R)[x]=J(R[x]),则R[x]是幂级数J-Armendariz环。展开更多
设R是环,证明了:1)R是右Noether,右单J-内射环,且Sr≤eRR或R是右Goldie,右单J-内射环,且Sr≤eRR,则R是右QF环;2)如果R是左完全环且当Rk或kR是单左或右理想时,r(k)是有限生成的,则R是右QF环.推广了文献[2]中Nicholson W K,Park J K,Yousi...设R是环,证明了:1)R是右Noether,右单J-内射环,且Sr≤eRR或R是右Goldie,右单J-内射环,且Sr≤eRR,则R是右QF环;2)如果R是左完全环且当Rk或kR是单左或右理想时,r(k)是有限生成的,则R是右QF环.推广了文献[2]中Nicholson W K,Park J K,Yousif M F的相关结论并使著名的Faith猜想有了新的进展.展开更多
文摘Let R be a ring and J(R) the Jacobson radical. An element a of R is called(strongly) J-clean if there is an idempotent e ∈ R and w ∈ J(R) such that a = e + w(and ew = we). The ring R is called a(strongly) J-clean ring provided that every one of its elements is(strongly) J-clean. We discuss, in the present paper,some properties of J-clean rings and strongly J-clean rings. Moreover, we investigate J-cleanness and strongly J-cleanness of generalized matrix rings. Some known results are also extended.
文摘引入幂级数J-Armendariz环的概念,进一步扩展幂级数Armendariz环的研究。证明了:(1)设T=(R 0 M S)是一个形式三角矩阵环,则T是幂级数J-Armendariz环当且仅当R和S都是是幂级数J-Armendariz环;(2)设{R_αα∈Λ}是一族环,则直积∏α∈ΛR_α是幂级数J-Armendariz环当且仅当每一个环R_α都是幂级数J-Armendariz环;(3)如果环R是幂级数J-Armendariz环,满足J(R)[x]=J(R[x]),则R[x]是幂级数J-Armendariz环。
文摘设R是环,证明了:1)R是右Noether,右单J-内射环,且Sr≤eRR或R是右Goldie,右单J-内射环,且Sr≤eRR,则R是右QF环;2)如果R是左完全环且当Rk或kR是单左或右理想时,r(k)是有限生成的,则R是右QF环.推广了文献[2]中Nicholson W K,Park J K,Yousif M F的相关结论并使著名的Faith猜想有了新的进展.