-группы.
В.П. Шунков (1984)
Algebra i Logika
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В.П. Шунков (1984)
Algebra i Logika
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Е.А. Палютин (2003)
Algebra i Logika
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А.В. Васильева (1976)
Algebra i Logika
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Ю.И. Мерзляков (1968)
Algebra i Logika
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С.А. Сыскин (1979)
Algebra i Logika
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Б.М. Веретенников (1983)
Algebra i Logika
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А.Н. Дегтев (1976)
Algebra i Logika
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И.Ш. Калимуллин (2000)
Algebra i Logika
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А.С. Кондратьев (1988)
Algebra i Logika
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Е.А. Палютин (1977)
Algebra i Logika
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В.В. Вьюгин (1974)
Algebra i Logika
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Ю.Л. Ершов (1985)
Algebra i Logika
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О.В. Кудинов, O. V. Kudinov, O. V. Kudinov, O. V. Kudinov (1996)
Algebra i Logika
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Man-Duen Choi, Pei Yuan Wu (2006)
Studia Mathematica
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We completely characterize the ranks of A - B and for operators A and B on a Hilbert space satisfying A ≥ B ≥ 0. Namely, let l and m be nonnegative integers or infinity. Then l = rank(A - B) and for some operators A and B with A ≥ B ≥ 0 on a Hilbert space of dimension n (1 ≤ n ≤ ∞) if and only if l = m = 0 or 0 < l ≤ m ≤ n. In particular, this answers in the negative the question posed by C. Benhida whether for positive operators A and B the finiteness of rank(A - B) implies that...
М.Г. Перетятькин (1980)
Algebra i Logika
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