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Scientific communications
On the index, null elements and elements of the kernel of an unbounded operator
I. Ts. Gokhberg
Citation:
I. Ts. Gokhberg, “On the index, null elements and elements of the kernel of an unbounded operator”, Russian Math. Surveys, 12:1 (1957)
Linking options:
https://www.mathnet.ru/eng/rm7540 https://www.mathnet.ru/eng/rm/v12/i1/p177
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