%0 Journal Article %T On Finite Rank Operators on Centrally Closed Semiprime Rings %A J. C. Cabello %A R. Casas %A P. Montiel %J Advances in Pure Mathematics %P 499-505 %@ 2160-0384 %D 2014 %I Scientific Research Publishing %R 10.4236/apm.2014.49056 %X We prove that the multiplication ring of a centrally closed semiprime ring R has a finite rank operator over the extended centroid C iff R contains an idempotent q such that qRq is finitely generated over C and, for each \"\" , there exist \"\" and e an idempotent of C such that xz=eq. %K Ring %K Semiprime Ring %K Extended Centroid %K Minimal Idempotent %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49454