О многообразии в -мерном проективном пространстве
Е.Т. Ивлев (1967)
Sibirskij matematiceskij zurnal
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Е.Т. Ивлев (1967)
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Dumitru Popa (2013)
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Let 1 ≤ p < ∞, be a sequence of Banach spaces and the coresponding vector valued sequence space. Let , be two sequences of Banach spaces, , Vₙ: Xₙ → Yₙ, a sequence of bounded linear operators and 1 ≤ p,q < ∞. We define the multiplication operator by . We give necessary and sufficient conditions for to be 2-summing when (p,q) is one of the couples (1,2), (2,1), (2,2), (1,1), (p,1), (p,2), (2,p), (1,p), (p,q); in the last case 1 < p < 2, 1 < q < ∞. ...
Mordechay B. Levin, Meir Smorodinsky (2005)
Colloquium Mathematicae
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We extend Champernowne’s construction of normal numbers to base b to the case and obtain an explicit construction of a generic point of the shift transformation of the set .
Juan Manuel Delgado, Cándido Piñeiro (2015)
Studia Mathematica
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Let be a Banach operator ideal. Based on the notion of -compactness in a Banach space due to Carl and Stephani, we deal with the notion of measure of non–compactness of an operator. We consider a map (respectively, ) acting on the operators of the surjective (respectively, injective) hull of such that (respectively, ) if and only if the operator T is -compact (respectively, injectively -compact). Under certain conditions on the ideal , we prove an equivalence inequality involving...
В.Н. Потапов (1997)
Sibirskij matematiceskij zurnal
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А.М. Вершик (1972)
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