共查询到20条相似文献,搜索用时 0 毫秒
1.
2.
Helmut Groemer 《Mathematische Annalen》1964,154(1):88-102
Ohne ZusammenfassungDie Durchführung dieser Arbeit wurde von der National Science Foundation unterstützt (Research Grant NSF-GP-261). 相似文献
3.
Ludwig Danzer 《Archiv der Mathematik》1957,8(4):314-316
Ohne ZusammenfassungDiese Arbeit entstand im Rahmen eines Stipendiums, für das ich der Deutschen Forschungsgemeinschaft auch an dieser Stelle Meinen Dank aussprechen möchte. 相似文献
4.
5.
Randolf Arnold 《Monatshefte für Mathematik》1989,108(4):277-293
LetK andL be convex bodies of then-dimensional Euclidean spaceE
n
. The -distance ofK andL is defined by
, whereh
k
andh
L
denote the support functions ofK andL restricted to the unit sphereS
n–1
E
n
. We consider the problem of best approximation ofL by the images k ofK under proper rigid motions :E
n
E
n
. A motion that minimizes 2(K
L) is called optimal for (K, L) in the sense of the metric 2. The results in the general case (n2 arbitrary) base on the fact that the Steiner points of K andL coincide if is optimal for (K, L). Forn=2 we obtain a relationship between convex convolution bodies and the underlying approximation problem. 相似文献
6.
7.
The author has recently shown thatv. Mises' theory of the plastic potential, if valid for the elements of a rigid-plastic body, also holds for the representation in generalized strains and stresses. This paper supplies the analogous proof for an elastic-plastic body. Here, however, the yield surface deforms, even in the case of perfect plasticity. Besides, it is impossible to determine the shape of the yield surface without considering the real state of stress. Thus, the simplification resulting from the use of generalized coordinates is less than in the case of a rigid-plastic body. 相似文献
8.
Hans Ziegler 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1960,11(5):413-426
This paper supplies a proof, free of any physical assumptions, thatv. Mises' theory of the plastic potential, if valid for the elements of a rigid-plastic body, also holds for the representation in generalized strains and stresses. 相似文献
9.
10.
11.
12.
13.
14.
15.
16.
Detlef Gröger 《Journal of Geometry》1992,44(1-2):53-64
Let an ordered field (K, <) be given. It is well-known that the orderings on the rational function field K(t) extending the ordering < on K correspond in a unique way to the cuts in the real closure R of K. Here we show that for two of these orderings, (K(t),1) is K-isomorphic to (K(t), 2) as ordered fields iff there exists a fractional linear function on K transforming the corresponding cuts in R into each other. As a corollary we can determine the group of all K-automorphisms on (K(t), ).
Rafael Artzy zum 80. Geburtstag gewidmet 相似文献
Rafael Artzy zum 80. Geburtstag gewidmet 相似文献
17.
P. M. Cohn 《Archiv der Mathematik》1962,13(1):344-348
Ohne ZusammenfassungHerrnReinhold Baer zum 60. Geburtstag gewidmetThis research was supported by the United States Air Force under Contract No. SAR/G/AF/ OSR/61-29. 相似文献
18.
19.
20.
Ohne Zusammenfassung 相似文献