Psomopoulos, E. A commutativity theorem for rings involving a subset of the ring. (English) Zbl 0528.16017 Glas. Mat., III. Ser. 18(38), 231-236 (1983). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 16U70 Center, normalizer (invariant elements) (associative rings and algebras) Citations:Zbl 0251.16021; Zbl 0476.16025; Zbl 0415.16025 PDFBibTeX XMLCite \textit{E. Psomopoulos}, Glas. Mat., III. Ser. 18(38), 231--236 (1983; Zbl 0528.16017)