There is given a criterion for an arbitrary element from the unit sphere of Musielak-Orlicz function space equipped with the Luxemburg norm to be a point of smoothness. Next, as a corollary, a criterion of smoothness of these spaces is given.
@article{118644, author = {Zenon Zb\k aszyniak}, title = {Smooth points of the unit sphere in Musielak-Orlicz function spaces equipped with the Luxemburg norm}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {35}, year = {1994}, pages = {95-102}, zbl = {0823.46033}, mrnumber = {1292586}, language = {en}, url = {http://dml.mathdoc.fr/item/118644} }
Zbąszyniak, Zenon. Smooth points of the unit sphere in Musielak-Orlicz function spaces equipped with the Luxemburg norm. Commentationes Mathematicae Universitatis Carolinae, Tome 35 (1994) pp. 95-102. http://gdmltest.u-ga.fr/item/118644/
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