Relations between certain problems of Banach
F. Murray (1936)
Studia Mathematica
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Displaying similar documents to “On simultaneous extension of infinitely differentiable functions”
Relations between certain problems of Banach
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Miroslav Katětov (1947)
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When ε-boundaries are manifolds
Steve Ferry (1976)
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Jan Kučera (1970)
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Z. Ciesielski, T. Figiel (1983)
Studia Mathematica
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The General Differential Operators Generated by a Quasi-Differential Expressions with their Interior Singular Points
El-sayed Ibrahim, Sobhy (1999)
Serdica Mathematical Journal
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The general ordinary quasi-differential expression M of n-th order with complex coefficients and its formal adjoint M + are considered over a regoin (a, b) on the real line, −∞ ≤ a < b ≤ ∞, on which the operator may have a finite number of singular points. By considering M over various subintervals on which singularities occur only at the ends, restrictions of the maximal operator generated by M in L2|w (a, b) which are regularly solvable with respect to the minimal operators T0...
Remarks on real-compact spaces
R. Engelking (1964)
Fundamenta Mathematicae
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Perfect sets of finite class without the extension property
A. Goncharov (1997)
Studia Mathematica
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We prove that generalized Cantor sets of class α, α ≠ 2 have the extension property iff α < 2. Thus belonging of a compact set K to some finite class α cannot be a characterization for the existence of an extension operator. The result has some interconnection with potential theory.