Original Articles

Left-right consistency in rings III

Published in: Quaestiones Mathematicae
Volume 34 , issue 3 , 2011 , pages: 335–339

DOI: 10.2989/16073606.2011.622884

Author(s): Dragan Djordjevic Faculty of Science and Mathematics, Serbia , Robin Harte School of Mathematics, Ireland , Cora Stack Department of Mathematics, Ireland

Keywords: 46H05 , 47A05 , 46H05 , 47A05

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Abstract

A bounded linear operator T is said to be “left-right consistent” if the spectra of all the products ST and TS coincide. In this note we relate the associated “consistency spectrum” to Fredholm theory, and to the “fat boundary”.

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