Antiprojectors with applications in the spectral theory
Erich Barvínek (1984)
Archivum Mathematicum
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Erich Barvínek (1984)
Archivum Mathematicum
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Vladimír Kordula (1993)
Czechoslovak Mathematical Journal
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Yakov Zalmanovitch Tsypkin, Michael S. Epelman (1965)
Kybernetika
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Jan Kučera (1972)
Czechoslovak Mathematical Journal
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