Using a Diagonalization Theorem obtained when the spectrum is Lipschitzian, we extend a result of G. Braatvedt on scalar characterization in Banach algebras to Banach-Jordan algebras. We also establish that any element of a semisimple Banach-Jordan algebra with the property that all elements in some neighbourhood of the identity are spectrally invariant under multiplication by the quadratic U operator, has analogs with the identity.
| Primary Language | English |
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| Subjects | Mathematical Sciences |
| Journal Section | Research Article |
| Authors | |
| Submission Date | February 28, 2018 |
| Acceptance Date | April 6, 2018 |
| Publication Date | June 26, 2018 |
| Published in Issue | Year 2018 Volume: 1 Issue: 2 |
Universal Journal of Mathematics and Applications
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