Abstract
Let T and T~ be closed linear operators in a Hilbert space. Let the spectrum of T is in the right half-plane. We suggest the conditions, under which the spectrum of T~ also lies in the right half-plane.
Original language | English |
---|---|
Pages (from-to) | 1121-1127 |
Number of pages | 7 |
Journal | Afrika Matematika |
Volume | 31 |
Issue number | 7-8 |
DOIs | |
State | Published - 1 Nov 2020 |
Keywords
- Hilbert space
- spectrum perturbation
- unbounded operators
ASJC Scopus subject areas
- Mathematics (all)