共查询到10条相似文献,搜索用时 140 毫秒
1.
Alina Sîntămărian 《Numerical Algorithms》2007,46(2):141-151
The purpose of this paper is to evaluate the limit γ(a) of the sequence , where a ∈ (0, + ∞ ).
相似文献
2.
In the present paper, necessary and sufficient conditions are given for the equality of the power rezidue symbols
( \fracaa )n {\left( {\frac{\alpha }{a}} \right)_n} and
( \fracaa )n {\left( {\frac{\alpha }{a}} \right)_n} in the cyclotomic field ℚ(ζ
n
), 2 ∤ n, for a ∈ ℤ, (a, n) = 1. This result is a generalization of the classical Eisenstein reciprocity law and its continuation in a Hasse’s paper.
Bibliography: 3 titles. 相似文献
3.
Fernando Schwartz 《Annales Henri Poincare》2011,12(1):67-76
We consider asymptotically flat Riemannian manifolds with non-negative scalar curvature that are conformal to
\mathbbRn\ W, n 3 3{\mathbb{R}^{n}{\setminus} \Omega, n\ge 3}, and so that their boundary is a minimal hypersurface. (Here,
W ì \mathbbRn{\Omega\subset \mathbb{R}^{n}} is open bounded with smooth mean-convex boundary.) We prove that the ADM mass of any such manifold is bounded below by
\frac12(V/bn)(n-2)/n{\frac{1}{2}\left(V/\beta_{n}\right)^{(n-2)/n}}, where V is the Euclidean volume of Ω and β
n
is the volume of the Euclidean unit n-ball. This gives a partial proof to a conjecture of Bray and Iga (Commun. Anal. Geom. 10:999–1016, 2002). Surprisingly, we do not require the boundary to be outermost. 相似文献
4.
Li Xin Zhang 《数学学报(英文版)》2008,24(4):631-646
Let X, X1, X2,... be i.i.d, random variables with mean zero and positive, finite variance σ^2, and set Sn = X1 +... + Xn, n≥1. The author proves that, if EX^2I{|X|≥t} = 0((log log t)^-1) as t→∞, then for any a〉-1 and b〉 -1,lim ε↑1/√1+a(1/√1+a-ε)b+1 ∑n=1^∞(logn)^a(loglogn)^b/nP{max κ≤n|Sκ|≤√σ^2π^2n/8loglogn(ε+an)}=4/π(1/2(1+a)^3/2)^b+1 Г(b+1),whenever an = o(1/log log n). The author obtains the sufficient and necessary conditions for this kind of results to hold. 相似文献
5.
L. Baratchart V. A. Prokhorov E. B. Saff 《Foundations of Computational Mathematics》2001,1(4):385-416
Let E \subset(-1,1) be a compact set, let μ be a positive Borel measure with support \supp μ =E , and let H
p
(G),
1≤ p ≤∈fty, be the Hardy space of analytic functions on the open unit disk G with circumference Γ={z \colon |z|=1} . Let Δ
n,p
be the error in best approximation of the Markov function \frac{1}{2π i} ∈t_E \frac{d μ(x)}{z-x} in the space L
p
(Γ) by meromorphic functions that can be represented in the form h=P/Q , where P ∈ H
p
(G),
Q is a polynomial of degree at most n , Q\not \equiv 0 . We investigate the rate of decrease of Δ
n,p
,
1≤ p ≤∈fty , and its connection with n -widths. The convergence of the best meromorphic approximants and the limiting distribution of poles of the best approximants
are described in the case when 1<p≤∈fty and the measure μ with support E=[a,b] satisfies the Szegő condition ∈t_a^b \frac{\log(d μ/ d x)}{\sqrt{(x-a)(b-x)}} dx >- ∈fty.
July 27, 2000. Final version received: May 19, 2001. 相似文献
6.
A. V. Bondarenko 《Ukrainian Mathematical Journal》2000,52(6):953-959
We consider the problem of existence of solutions of the equation
in natural numbers for differentm∈N. We prove that this equation possesses solutions in natural numbers form=a
2+5,a∈Z, and does not have solutions ifm=4p
2,p∈N, andp is not divisible by 3. We also prove that, forn≥12, the equation
possesses solutions in natural numbers if and only ifm≥n,m∈N.
Kiev University, Kiev. Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 52, No. 6, pp. 831–836, June, 2000. 相似文献
7.
In this paper, we introduce the concept of (1, 1)-q-coherent pair of linear functionals (U,V)(\mathcal{U},\mathcal{V}) as the q-analogue to the generalized coherent pair studied by Delgado and Marcellán in (Methods Appl Anal 11(2):273–266, 2004). This means that their corresponding sequences of monic orthogonal polynomials {P
n
(x)}
n ≥ 0 and {R
n
(x)}
n ≥ 0 satisfy
\frac(DqPn+1)(x)[n+1]q + an\frac(DqPn)(x)[n]q = Rn(x) + bnRn-1(x) , an 1 0, n 3 1, \frac{\left(D_qP_{n+1}\right)(x)}{[n+1]_q} + a_{n}\frac{\left(D_qP_{n}\right)(x)}{[n]_q} = R_{n}(x) + b_{\!n}R_{n-1}(x) \,, \quad\, a_{n}\neq0,\,\, n\geq1, 相似文献
8.
Alexander Koldobsky 《Discrete and Computational Geometry》2012,47(3):538-547
Let 2≤n≤4. We show that for an arbitrary measure μ with even continuous density in ℝ
n
and any origin-symmetric convex body K in ℝ
n
,
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