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1.
FINITETRAVELINGWAVESFORAREACTION┐DIFFUSIONSYSTEMWITHN(3)COMPONENTSWANGSHU,WENSHIHLIANGANDYEQIXIAOAbstract.Inthispaper,theex...  相似文献   

2.
Let
be the Fejér kernel, C be the space of contiuous 2π-periodic functions f with the norm , let
be the Jackson polynomials of the function f, and let
be the Fejér sums of f. The paper presents upper bounds for certain quantities like
which are exact in order for every function fC. Special attention is paid to the constants occurring in the inequalities obtained. Bibliography: 14 titles. Translated from Zapiski Nauchnykh Seminarov POMI, Vol. 357, 2008, pp. 90–114.  相似文献   

3.
4.
We theoretically investigate the asymptotical stability, local bifurcations and chaos of discrete-time recurrent neural networks with the form of
, where the input-output function is defined as a generalized sigmoid function, such asv i =2/π arctan(π/2μiμi), and , etc. Numerical simulations are also provided to demonstrate the theoretical results.  相似文献   

5.
When E is a closed set of measure zero in the dyadic group and the Walsh series satisfies
, then for some c > 0,
Consequently any control function of the a.e. convergence is not L/(log+ L)-integrable.  相似文献   

6.
Some oscillation theorems are given for the nonlinear second order elliptic equationsum from i,j=1 to N D_i[a_(ij)(x)Ψ(y)||▽y||~(p-2)D_(jy)] c(x)f(y)=0.The results are extensions of modified Riccati techniques and include recent results of Usami.  相似文献   

7.
The paper considers solutions of the coercive inequalities
defined on an arbitrary (possibly, unbounded) subset ℝ n , where n ≥ 2, L and are elliptic operators of the form
, and F is a certain function. __________ Translated from Sovremennaya Matematika. Fundamental'nye Napravleniya (Contemporary Mathematics. Fundamental Directions), Vol. 7, Partial Differential Equations, 2004.  相似文献   

8.
In this paper we consider the parabolic equation with random coefficients:
  相似文献   

9.
Let→b=(b1,b2,…,bm),bi∈∧βi(Rn),1≤I≤m,βi>0,m∑I=1βi=β,0<β<1,μΩ→b(f)(x)=(∫∞0|F→b,t(f)(x)|2dt/t3)1/2,F→b,t(f)(x)=∫|x-y|≤t Ω(x,x-y)/|x-y|n-1 mΠi=1[bi(x)-bi(y)dy.We consider the boundedness of μΩ,→b on Hardy type space Hp→b(Rn).  相似文献   

10.
The solution u of the well-posed problem
depends continuously on (a ij ,β,γ,q). Dedicated to Karl H. Hofmann on his 75th birthday.  相似文献   

11.
For a trigonometric series
defined on [−π, π) m , where V is a certain polyhedron in R m , we prove that
if the coefficients a k satisfy the following Sidon-Telyakovskii-type conditions:
Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 60, No. 5, pp. 579–585, May, 2008.  相似文献   

12.
In this paper we solve the equations
  相似文献   

13.
Let M be either the space of 2π-periodic functions Lp, where 1 ≤ p < ∞, or C; let ωr(f, h) be the continuity modulus of order r of the function f, and let
, where
, be the generalized Jackson-Vallée-Poussin integral. Denote
. The paper studies the quantity Km(f − Dn,r,l(f)). The general results obtained are applicable to other approximation methods. Bibliography: 11 titles. __________ Translated from Zapiski Nauchnykh Seminarov POMI, Vol. 350, 2007, pp. 52–69.  相似文献   

14.
By the Fourier method a solution of the equation
  相似文献   

15.
We prove partial regularity results for local minimisers of
  相似文献   

16.
By using the averaging technique, we establish some oscillation theorems for the second order damped elliptic differential equation N↑∑↓i,j=1 Di[AIY(x)Djy]+N↑∑↓i=1 bi(x)Diy+c(x)f(y)=0 which extend and improve some known results in the literature.  相似文献   

17.
Let {X n } n0 be a Harris recurrent Markov chain with state space E, transition probability P(x, A) and invariant measure , and let f be a real measurable function on E. We prove that with probability one,
under some best possible conditions.  相似文献   

18.
Let f(z) be a holomorphic Hecke eigenform of weight k with respect to SL(2, ) and let
denote the symmetric square L-function of f. A Voronoi type formula for
and the relation
are proved. Heuristic approaches to estimation of exponential sums arising in this connection are considered. Bibliography: 9 titles. __________ Translated from Zapiski Nauchnykh Seminarov POMI, Vol. 314, 2004, pp. 247–256.  相似文献   

19.
We present a method for the solution of the Cauchy problem for three broad classes of nonlinear parabolic equations
and
with the infinite-dimensional Laplacian ΔL.  相似文献   

20.
By using vector Riccati transformation and averaging technique, some oscillation criteria for the quasilinear elliptic differential equation of second order, ΣNi,j=1Di[Ψ(y)Aij(x)|Dy|^p-2Djy]+p(x)f(y)=0, are obtained. These theorems extend and include earlier results for the semilinear elliptic equation and PDE with p-Laplacian.  相似文献   

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