共查询到20条相似文献,搜索用时 78 毫秒
1.
F. Schipp 《Analysis Mathematica》1990,16(2):135-141
H={h
1,I } — , . : , I ¦(I)¦=¦I¦, ¦I¦ — I. H H
={h
(I),I} . , , . L
p
.
Dedicated to Professor B. Szökefalvi-Nagy on his 75th birthday
This research was supported in part by MTA-NSF Grants INT-8400708 and 8620153. 相似文献
Dedicated to Professor B. Szökefalvi-Nagy on his 75th birthday
This research was supported in part by MTA-NSF Grants INT-8400708 and 8620153. 相似文献
2.
, (n), - (P
n
), P
n
(A
n
)>0P
n
(A
n
)0,n. [15] - , . , P
n
P
n
T
n
T
n
. 相似文献
3.
V. F. Gapoškin 《Analysis Mathematica》1980,6(2):105-119
a
k
f
k
, f
k
L
2, w-, (2), w(n) — .
a
k
f
k
N {a
k
}l
2, {a
k
}l
2 ( 1, 2, 1a, 2a). ( 2) [8]. , {a
k
} w-. 相似文献
4.
R
n. , , , F R
n, F , R
n R
n .
p,q
(Rn), >0, 1, q, — ( ) Rn. ,
p,q
(Rn) F Rn. , q B
p,q
(F), = – (n–)/, >0, — « », ad — F, . , . : , F=R
d,F— « » F— R
n, « », F. .
This work has been supported in part by the Swedish Natural Science Research Council. 相似文献
This work has been supported in part by the Swedish Natural Science Research Council. 相似文献
5.
S. A. Nazarov 《Journal of Mathematical Sciences》1993,64(6):1351-1362
The asymptotic behavior as h0 of the solution of a mixed boundary value problem is investigated for an elliptic (in the sense of Petrovskii) system of second-order differential equations in the n-dimensional cylinder Q
h
=×(–h/2, h/2) of small altitude h; is a domain in R
n
–1. The limit problem in contains a small parameter =h
, (0, 1), for higher-order derivatives and degenerates regularly, as 0, into an elliptic problem of a lower order. It is shown that the limit problem and its corresponding degenerate problem (=0) are uniquely solvable. An estimate for the difference of solutions of the original and the limit problem in the energy norm is established. As an example, a problem on the deformation of a thin plate in the framework of the Cosserat continuum is considered.Translated from Problemy Matematicheskogo Analiza, No. 11, pp. 191–208, 1990. 相似文献
6.
Richard Koch 《Journal of Geometry》1984,23(2):152-169
Let be the middle surface of an isotropic rectilinear congruence of class C3 in the real Euclidean space E3. When the spherical image of is parametrized by special isothermal coordinates (u,v) G 2, can be described by a generating harmonic function A(u,v). Using such a C-representation of , the basic properties of regularity and curvature of are discussed. Moreover, the cases that be a minimal (regular) surface 1, or a plane surface 2 are solved explicitly. In connection with the latter results (which are already well-known from Ribaucour) several new characterizations for being a regular surface 1 resp. 2 are given: they are based on special properties (like: being asymptotic lines resp. lines of curvature of ) of those curves c (-Spurlinien) in the tangents of which form in each point Xc a minimal angle with the straight line of passing through X.
Herrn Prof. Dr. Karl Strubecker zum 80. Geburtstag gewidmet 相似文献
Herrn Prof. Dr. Karl Strubecker zum 80. Geburtstag gewidmet 相似文献
7.
V. A. Andrienko 《Analysis Mathematica》1996,22(4):243-266
( ) . .
Dedicated to Professor K. Tandori on his seventieth birthday
This research was supported in part by Grant # K41 100 of the Joint Fund of the Government of Ukraine and the International Science Foundation. 相似文献
Dedicated to Professor K. Tandori on his seventieth birthday
This research was supported in part by Grant # K41 100 of the Joint Fund of the Government of Ukraine and the International Science Foundation. 相似文献
8.
, [0, 1], (n+1) n-. . [2]. — (. 5.4 5.6). . 6.4 2 [5]. , [4]. , , [6] [7]. [1]. 相似文献
9.
A. G. Areshkina 《Mathematical Notes》1998,64(2):154-158
On a measurable space (T, , ) we choose an additive measure: Z (Z is a Banach space) with the following property: for alle , we have
; this measure defines an indefinite integral over the measure onL
2
(T, ,). We prove that if {
n
(t)}
n
=1/
is an orthonormal basis inL
2 and
n
(e)=e
n
(t) d, then any additive measure: Z whose Radon-Nikodým derivatived/d belongs toL
2 is uniquely expandable in a series(e)=
n
=1/
n
n(e) that converges to(e) uniformly with respect toe can be differentiated term-by-term, and satisfies
n
=1/
n
/2
<. In the caseL
2[0,2],Z=, the Fourier series of a 2-periodic absolutely continuous functionF(t) such thatF'(t) L
2[0, 2] is superuniformly convergent toF(t).Translated fromMatematicheskie Zametki, Vol. 64, No. 2, pp. 180–184, August, 1998. 相似文献
10.
R. Ž. Nurpeisov 《Analysis Mathematica》1989,15(2):127-143
H
(G), f(g)H
(G) , (, 1)- OHMC G. , OHMC, A. H. . , . , OHMC, lim supp
n=, , ,n .. . , 117 234 . . - 相似文献
11.
Markus Stroppel 《Geometriae Dedicata》1993,45(1):93-99
In [4], K. Strambach describes a 2-dimensional stable plane
admitting =SL2 as a group of automorphisms such that there exists no -equivarient embedding into a 2-dimensional projective plane. R. Löwen [3] has given a 4-dimensional analogue
, admitting =SL2. He posed the question whether there are embeddings of Strambach's plane
into
. We show that such embeddings exist, in fact we determine all -equivariant embeddings of 2-dimensional stable planes admitting as atransitive group of automorphisms. 相似文献
12.
Weighted Polynomial Approximation for Weights with Logarithmic Singularities in the Extremal Measure
P. C. Simeonov 《Acta Mathematica Hungarica》1999,82(4):265-296
Let w : [0, ) be a weight function on a set R. We assume that the associated extremal measure has density function v(t) with finitely many singularities of logarithmic type. We show that any continuous function f on which vanishes outside the set where v is positive or has a logarithmic singularity, is the uniform limit on of a sequence of weighted polynomials of the form wn Pn, where Pn is of degree n. This extends previous results for continuous densities to densities having logarithmic singularities. 相似文献
13.
14.
Anne Bertrand-Mathis 《Acta Mathematica Hungarica》1998,78(1-2):71-78
We show that for reasonable couples of Pisot number and , there is no measure simultaneously invariant by the two transformations of [0, 1], x {x} and x {x}, and Bernoulli (or weak Bernoulli) for one of the transformations. 相似文献
15.
Let X be a Banach space and (,,µ) be a -finite measure space. We consider a strongly continuous d-dimensional semigroup T={T(u):u=(u1,..., ud, ui >0, 1 i d} of linear contractions on Lp((,,µ); X), with 1 p<. In this paper differentiation theorems are proved for d-dimensional bounded processes in Lp((,,µ); X) which are additive with respect to T. In the theorems below we assume that each T(u) possesses a contraction majorant P(u) defined on Lp((,,µ); R), that is, P(u) is a positive linear contraction on Lp((,,µ); R) such that T(u)f(w) P(u)f(·)() almost everywhere on for all f Lp((,,µ); X). 相似文献
16.
A class of nonseparable dynamic programming problems 总被引:3,自引:0,他引:3
M. Sniedovich 《Journal of Optimization Theory and Applications》1987,52(1):111-121
A solution procedure is proposed for a class of deterministic sequential decision problems whose objective functions are of the form f
n(x
n)+(g
n(x
n)) where is differentiable and either concave or convex. The procedure calls for the collaboration between dynamic programming and c-programming, and is demonstrated in our treatment of a minimum variance type problem. 相似文献
17.
Mario Petrich 《Monatshefte für Mathematik》1993,116(3-4):287-298
For a Rees matrix semigroupS with normalized sandwich matrix and C(S), the congruence lattice ofS, we consider the lattice generated by {itpTl, pK, pTr, ptl, pk, ptr}. HerepT
1 andpt
l
are the upper and lower ends of the interval which makes up the
i
-class of ,
i
being the left trace relation onC(S). The remaining symbols have the analogous meaning relative to the kernel and the right trace relations. We also consider the lattice generated by {T
l, K, Tr, tl, k, tr} where and are the equality and the universal relations onS, respectively. In both cases, we find lattices freest relative to these lattices and represent them as distributive lattices with generators and relations.With 3 Figures 相似文献
18.
Günter F. Steinke 《Geometriae Dedicata》1990,36(2-3):389-404
In this note we consider 2-dimensional Laguerre planes and prove structure theorems on their automorphism group . In particular, we look at connected locally simple Lie subgroups of and the factor group / of a connected closed subgroup of over the kernel of the action of on the set of parallel classes. The informations obtained will be useful in the later classification of 2-dimensional Laguerre planes having a 4-dimensional automorphism group.Dedicated to Professor H. Salzmann on the occasion of his 60th birthday 相似文献
19.
N. A. Vavilov 《Journal of Mathematical Sciences》1987,37(2):942-952
Let G be the Chevalley group over a commutative semilocal ring R which is associated with a root system . The parabolic subgroups of G are described in the work. A system =() of ideals in R ( runs through all roots of the system ) is called a net of ideals in the commutative ring R if + for all those roots and for which + is also a root. A net is called parabolic if =R for >0. The main theorem: under minor additional assumptions all parabolic subgroups of G are in bijective correspondence with all parabolic nets . The paper is related to two works of K. Suzuki in which the parabolic subgroups of G are described under more stringent conditions.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 75, pp. 43–58, 1978. 相似文献
20.