Constantin, Gh. On operators with the same spectrum. (English) Zbl 0304.47003 Mat. Vesn., N. Ser. 12(27), 25-28 (1975). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 47A10 Spectrum, resolvent 47B15 Hermitian and normal operators (spectral measures, functional calculus, etc.) PDFBibTeX XMLCite \textit{Gh. Constantin}, Mat. Vesn., N. Ser. 12(27), 25--28 (1975; Zbl 0304.47003)