Timeline for Essential spectrum under perturbation
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Aug 5, 2021 at 19:02 | answer | added | M.González | timeline score: 3 | |
| Aug 5, 2021 at 18:41 | comment | added | Malik Amine | The set of all complex numbers $\lambda$ such that $\lambda-T$ is not Fredholm operator. Since you've mentioned the essential radius, that's exactly what I am looking for: the stability of the essential radius under perturbation. | |
| Aug 5, 2021 at 18:24 | comment | added | Martin Väth | There are at least 3 definitions of "essential spectrum" which are not equivalent (though the corresponding essential spectral radius is the same). Which definition do you mean? | |
| Aug 5, 2021 at 14:39 | history | edited | Malik Amine | CC BY-SA 4.0 |
added 4 characters in body
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| Aug 5, 2021 at 14:20 | history | asked | Malik Amine | CC BY-SA 4.0 |