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Ohne ZusammenfassungHerrnFriedrich Karl Schmidt zum 60. Geburtstag am 22.9.1961 gewidmet  相似文献   

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It seems reasonable to assume that, in certain problems, some types of snow may be considered as perfectly plastic bodies. With this assumption, various problems concerned with the formation of avalanches and with its prevention are discussed.  相似文献   

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Ohne Zusammenfassung Alexander Ostrowski zum 60. Geburtstag gewidmetDen Herren D.Grosser, U.RahnenfÜhrer undTh. Schultheis (Aachen) sind wir fÜr die Berechnung der Unterlagen zu den Abbildungen, der Deutschen Forschungsgemeinschaft fÜr die UnterstÜtzung dieser Arbeiten zu Dank verpflichtet.  相似文献   

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Ohne ZusammenfassungMeinem Lehrer, Herrn Prof. Dr.Ernst Hölder, der mich auf die Arbeiten vonMorrey undCalkin hingewiesen hat, danke ich hiermit sehr.  相似文献   

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Ohne ZusammenfassungHerrn Prof. Dr.Max Müller in Tübingen danke ich für das Intersse, das er an der vorliegenden Untersuchung nahm. Ihm verdanke ich insbesondere die Literaturangaben.  相似文献   

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Ohne ZusammenfassungHerrnWilhelm Süss zum 60. Geburtstag am 7. März 1955 gewidmet.  相似文献   

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This article is concerned with ultradistribution spaces in the sense of Komatsu. For these spaces several tensor product theorems, especially Schwartz's kernels theorem for ultradistributions, are proved. Criteria which ensure that a nuclear locally convex space has an absolute basis are given and used to represent the spaces of periodic ultradifferential functions as Köthe sequence spaces. These results permit to state conditions on a sequence {Mp} which are equivalent to nuclearity, s-nuclearity or-as will be shown in part II-even -nuclearity of the corresponding ultradistribution spaces. Under some natural conditions the Beurling ultradistribution spaces defined by Komatsu are shown to constitute a proper subclass of those introduced by Beurling.  相似文献   

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Let R be a noetherian ring of dimension d and M a finitely generated R-module of homologic dimension less or equal to one. Assume further that M has a rank r, which equals d or (in case d>0) d?1 and that the r-th Fitting-ideal \(\vartheta _r (M)\) of M has grade ?d. Then the torsion-submodule of the d-th exterior power of M and the module \(R/\vartheta _r (M)\) are equivalent.  相似文献   

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Ohne ZusammenfassungHerrn Professor Dr.Bartel Leendert van der Waerden zum 60. Geburtstag am 2. 2. 1963 gewidmet  相似文献   

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Ohne ZusammenfassungProf.Hermann Schmidt zum 60. Geburtstag  相似文献   

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Ohne ZusammenfassungHerrn Prof. Dr. Paul Funk zum 75. Geburtstag gewidmet  相似文献   

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Summary A mathematical theory of milling processes is developed by deriving and solving a partial integro-differential equation which describes the time-dependent particle size distribution of the milling charge. This basic equation contains a characteristic function of both the mill and the material milled, which is conveniently determined from measurements conducted in accordance with an approximation derived for this purpose from the general theory. This approximation, which can as well be used independently is equally convenient for obtaining experimental evidence of the validity of the general theory. It has been established in a previous paper that this approximation is in agreement with results obtained by experiments.Several approximate solutions of the basic equation as well as the rigorous one are worked out and an analysis of the semi-empirical Rosin-Rammler formula is given from the point of view of the present theory.  相似文献   

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