Zelazko, W. On a problem concerning joint approximate point spectra. (English) Zbl 0256.47002 Stud. Math. 45, 239-240 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 4 Documents MSC: 47A10 Spectrum, resolvent PDF BibTeX XML Cite \textit{W. Zelazko}, Stud. Math. 45, 239--240 (1973; Zbl 0256.47002) Full Text: DOI EuDML OpenURL