On the projection constants of some topological spaces and some applications.
El-Shobaky, Entisarat, Ali, Sahar Mohammed, Takahashi, Wataru (2001)
Abstract and Applied Analysis
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El-Shobaky, Entisarat, Ali, Sahar Mohammed, Takahashi, Wataru (2001)
Abstract and Applied Analysis
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Hiroyuki Ishibashi (2006)
Czechoslovak Mathematical Journal
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We define a linear map called a semiinvolution as a generalization of an involution, and show that any nilpotent linear endomorphism is a product of an involution and a semiinvolution. We also give a new proof for Djocović’s theorem on a product of two involutions.
Popa, Dumitru (2001)
Abstract and Applied Analysis
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El-Shobaky, Entisarat, Ali, Sahar Mohammed, Takahashi, Wataru (2001)
Abstract and Applied Analysis
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Kuczmaszewska, Anna, Szynal, Dominik (2000)
International Journal of Mathematics and Mathematical Sciences
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Razani, Abdolrahman (2007)
Surveys in Mathematics and its Applications
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Hamahata, Y., Masubuchi, H. (2007)
Journal of Integer Sequences [electronic only]
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Kamil John (2006)
Czechoslovak Mathematical Journal
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We characterize the reflexivity of the completed projective tensor products of Banach spaces in terms of certain approximative biorthogonal systems.