Ascent, Descent, Nullity and Defect of Products of Operators
J. BuoniJ. Faires
Indiana University Mathematics Journal
1976
text
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10.1512/iumj.1976.25.25054
10.1512/iumj.1976.25.25054
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Indiana Univ. Math. J. 25 (1976) 703 - 707
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