Universal estimates of the spectral radius
Vlastimil Pták (1982)
Banach Center Publications
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Vlastimil Pták (1982)
Banach Center Publications
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Vlastimil Pták (1976)
Časopis pro pěstování matematiky
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Guessous, Mohamed (1997)
Journal of Convex Analysis
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Dan, Christina-Theresia (2009)
International Journal of Mathematics and Mathematical Sciences
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Vlastimil Pták (1976)
Commentationes Mathematicae Universitatis Carolinae
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Eberhard Gerlach (1971)
Annales de l'institut Fourier
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A general theorem on Hilbert subspaces of dually nuclear spaces is proved, from which all previous results of K. Maurin and the writer on regularity of generalized eigenfunctions follow as simple corollaries. In addition some supplements to L. Schwartz’s work on Hilbert subspaces in spaces of smooth functions are given.