Geodesic
Spectrally isometric elementary operators
Martin Mathieu1 ; Matthew Young1
1Pure Mathematics Research Centre Queen’s University Belfast Belfast BT7 1NN, Northern Ireland
Studia Mathematica, Tome 236 (2017) no. 1, pp. 33-49
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We present criteria for unital elementary operators (of small length) on unital semisimple Banach algebras to be spectral isometries. The surjective ones among them turn out to be algebra automorphisms.
DOI : 10.4064/sm8538-6-2016
Keywords: present criteria unital elementary operators small length unital semisimple banach algebras spectral isometries surjective among turn out algebra automorphisms

Martin Mathieu  1   ; Matthew Young  1

1 Pure Mathematics Research Centre Queen’s University Belfast Belfast BT7 1NN, Northern Ireland 
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Martin Mathieu; Matthew Young. Spectrally isometric elementary operators. Studia Mathematica, Tome 236 (2017) no. 1, pp. 33-49. doi: 10.4064/sm8538-6-2016

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