共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
Abdelmalek Azizi 《Proceedings of the American Mathematical Society》2002,130(8):2197-2202
Let and be prime numbers such that and . Let , , and let be the 2-Hilbert class field of , the 2-Hilbert class field of and the Galois group of . The 2-part of the class group of is of type , so contains three extensions . Our goal is to study the problem of capitulation of the 2-classes of in , and to determine the structure of .
RS
4.
Résumé Généralisant une question de Mukai,
nous conjecturons quune variété
de Fano X de nombre de Picard
X
et
de pseudo-indice
X
vérifie
$
X
(
X
- 1)
dim(X).
Nous démontrons cette conjecture dans plusieurs situations:
X est une variété
de Fano de dimension 4,
X est une variété
de Fano torique de dimension 7
ou X est une variété
de Fano torique de dimension arbitraire avec
$
X
dim(X) / 3 + 1.
Enfin, nous présentons une approche nouvelle pour le cas
général.
相似文献
5.
6.
7.
8.
9.
Doina Cioranescu 《Applied Mathematics and Optimization》1976,3(2-3):263-282
A constitutive law for a class of non newtonian fluids is considered. The stress-tension is defined as an element in the subgradient of a convex, l.s.c. function: (D);D is the tension of the rate of deformation. We give existence and uniqueness theorems. Some examples (Bingham fluid, pseudo-plastic and dilatant fluids) are also given. 相似文献
10.
11.
12.
Lee K. Jones 《Discrete Mathematics》1976,15(1):107-108
Nous donnons une généralisation et une démonstration très courte d'un théorème de Kleitman qui dit: Pour toute paire d'idéaux , (β) d'éléments dans le produit cartésien de k ensembles totalement ordonnés P = [1, 2, … n1] ? … ? [1, 2, … nk], nous avons (). ( ou en langage probabiliste . 相似文献
13.
14.
15.
16.
17.
J. -F. Le Gall 《Probability Theory and Related Fields》1988,78(3):389-402
Summary We consider the following heat conduction problem. Let K be a compact set in Euclidean space 3. Suppose that K is held at the temperature 1, while the surrounding medium is at the temperature 0 at time 0. Following Spitzer we investigate the asymptotic behaviour of the integral E
K
(t) which represents the total energy flow in time t from the set K to the surrounding medium 3–K. An asymptotic expansion is given for E
K
(t) which refines a theorem due to Spitzer. This expansion also verifies and improves a formal calculation of Kac. Similar results are proved in higher dimensions. Up to the constant m(K), the quantity E
K
(t) can be interpreted as the expected value of the volume of the Wiener sausage associated with K and a d-dimensional Brownian motion. This point of view both plays a major role in the proofs and leads to a probabilistic interpretation of the different terms of the expansion. 相似文献
18.
19.
20.
Sans résumé 相似文献