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On intrinsic compactness of regular solutions space of a class of higher order operator-differential equations
Hilbert spaces operator-differential equations
2010/9/14
In the paper we give definition of intrinsic compactness of regular solutions spaces of a class of higher order homogeneous operatordifferential equations and find sufficient conditions for intrinsic ...
Necessary and Sufficient Condition for Compactness of the Embedding Operator
Banach spaces Compactness Embedding operator
2008/6/30
An improvement of the author's result, proved in 1961, concerning necessary and sufficient conditions for the compactness of an imbedding operator is given.