Toward a Spectral Characterization of the Set of Norm Limits of Nilpotent Operators of Norm Limits of Nilpotent Operators
Domingo Herrero
Indiana University Mathematics Journal
1975
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10.1512/iumj.1975.24.24067
10.1512/iumj.1975.24.24067
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Indiana Univ. Math. J. 24 (1975) 847 - 864
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