| Title: | Smooth points of the unit sphere in Musielak-Orlicz function spaces  equipped with the Luxemburg norm (English) | 
| Author: | Zbąszyniak, Zenon | 
| Language: | English | 
| Journal: | Commentationes Mathematicae Universitatis Carolinae | 
| ISSN: | 0010-2628 (print) | 
| ISSN: | 1213-7243 (online) | 
| Volume: | 35 | 
| Issue: | 1 | 
| Year: | 1994 | 
| Pages: | 95-102 | 
| . | 
| Category: | math | 
| . | 
| Summary: | 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. (English) | 
| Keyword: | Musielak-Orlicz function | 
| Keyword: | Musielak-Orlicz space | 
| Keyword: | support functional | 
| Keyword: | smooth point | 
| Keyword: | smooth space | 
| MSC: | 45B20 | 
| MSC: | 46E30 | 
| idZBL: | Zbl 0823.46033 | 
| idMR: | MR1292586 | 
| . | 
| Date available: | 2009-01-08T18:09:00Z | 
| Last updated: | 2012-04-30 | 
| Stable URL: | http://hdl.handle.net/10338.dmlcz/118644 | 
| . | 
| Reference: | [A] Ando T.: Linear functionals on Orlicz spaces.Nieuw Arch. Wisk. 3,8 (1960), 1-16. Zbl 0129.08001, MR 0123907 | 
| Reference: | [C] Chen S.: Smoothness of Orlicz spaces.Comment. Math. (Prace Matem.) 27,1 (1987), 49-58. Zbl 0641.46010, MR 0910960 | 
| Reference: | [D] Diestel J.: Geometry of Banach spaces - selected topics.Lecture Notes in Math. 481, Springer-Verlag, 1975. Zbl 0466.46021, MR 0461094 | 
| Reference: | [GH] Grzaslewicz R., Hudzik H.: Smooth points of Orlicz spaces equipped with the Luxemburg norm.Math. Nachrichten 155 (1992), 31-45. MR 1231254 | 
| Reference: | [Hi] Himmelberg C.J.: Measurable relations.Fund. Math. 87,1 (1975), 53-72. Zbl 0296.28003, MR 0367142 | 
| Reference: | [H] Hudzik H.: On some equivalent conditions in Musielak-Orlicz spaces.Comment. Math. (Prace Matem.) 24,1 (1984), 57-64. Zbl 0564.46022, MR 0759055 | 
| Reference: | [HY] Hudzik H., Ye Y.: Support functionals and smoothness in Musielak-Orlicz sequence spaces endowed with the Luxemburg norm.Comment. Math. Univ. Carolinae 31,4 (1990), 661-684. Zbl 0721.46012, MR 1091364 | 
| Reference: | [Ka] Kamińska A.: Some convexity properties of Musielak-Orlicz spaces of Bochner type.Supplemento ai Rendiconti del Circolo Mathematico di Palermo, Serie II 10 (1985), 63-73. MR 0894273 | 
| Reference: | [K] Kozek A.: Convex integral functionals on Orlicz spaces.Comment. Math. (Prace Matem.) 21,1 (1980), 109-135. MR 0577677 | 
| Reference: | [KR] Krasnoselskiĭ M.A., Rutickiĭ Ya.B.: Convex functions and Orlicz spaces.Groningen 1961 (translation). | 
| Reference: | [L] Luxemburg W.A.J.: Banach function spaces.Thesis, Delft 1955. Zbl 0162.44701, MR 0072440 | 
| Reference: | [M] Musielak J.: Orlicz spaces and modular spaces.Lecture Notes in Math. 1034, Springer-Verlag 1983. Zbl 0557.46020, MR 0724434 | 
| Reference: | [N] Nowak M.: Linear functionals on Orlicz sequence spaces without local convexity.Internat. J. of Math. and Math. Sciences 1992. Zbl 0784.46009, MR 1155516 | 
| Reference: | [P] Phelps R.: Convex functions, monotone operators and differentiability.Lecture Notes in Math. 1364, Springer-Verlag, 1989. Zbl 0921.46039, MR 0984602 | 
| Reference: | [PY] Pluciennik R., Ye Y.: Differentiability of Musielak-Orlicz sequence spaces.Comment. Math. Univ. Carolinae 30 (1989), 699-711. Zbl 0706.46022, MR 1045898 | 
| Reference: | [RR] Rao M.M., Ren Z.D.: Theory of Orlicz spaces.Marcel Dekker Inc., New York-Basel-Hong Kong, 1991. Zbl 0724.46032, MR 1113700 | 
| . |