On the density of smooth functions in certain subspaces of Sobolev space
Pavel Doktor (1973)
Commentationes Mathematicae Universitatis Carolinae
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Pavel Doktor (1973)
Commentationes Mathematicae Universitatis Carolinae
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Ivo Babuška (1970)
Commentationes Mathematicae Universitatis Carolinae
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Marie Hájková (1971)
Commentationes Mathematicae Universitatis Carolinae
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