Grabiner, S. Ranges of quasi-nilpotentoperators. (English) Zbl 0204.45003 Ill. J. Math. 15, 150-152 (1971). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 4 Documents PDFBibTeX XMLCite \textit{S. Grabiner}, Ill. J. Math. 15, 150--152 (1971; Zbl 0204.45003)