نتایج جستجو برای: posner

تعداد نتایج: 863  

Journal: :Preventing Chronic Disease 2005
George A Mensah Ali H Mokdad Samuel F Posner Eddie Reed Eduardo J Simoes Michael M Engelgau

Suggested citation for this article: Mokdad AH, Mensah GA, Posner SF, Reed E, Simoes EJ, Engelgau MM, and the Chronic Diseases and Vulnerable Populations in Natural Disasters Working Group. When chronic conditions become acute: prevention and control of chronic diseases and adverse health outcomes during natural disasters. Prev Chronic Dis [serial online] 2005 Nov [date cited]. Available from: ...

Journal: :Int. J. Math. Mathematical Sciences 2005
Joso Vukman

The purpose of this paper is to investigate identities with derivations and automorphisms on semiprime rings. A classical result of Posner states that the existence of a nonzero centralizing derivation on a prime ring forces the ring to be commutative. Mayne proved that in case there exists a nontrivial centralizing automorphism on a prime ring, then the ring is commutative. In this paper, some...

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