共查询到20条相似文献,搜索用时 187 毫秒
1.
HOMOCLINICORBITSFORSECONDORDERHAMILTONIANSYSTEMWITHQUADRATICGROWTHWUSHAOPINGANDLIUJIAQUANAbstract:Someexistenceandmultiplicit... 相似文献
2.
Zhang Xiang 《数学年刊B辑(英文版)》1997,18(4):429-434
ONTWOCONJECTURESOFTHEQUADRATICDIFFERENTIALSYSTEMSZHANGXIANG*AbstractManuscriptreceivedSeptember29,1995.*InstituteofMathematic... 相似文献
3.
张伟年 《数学物理学报(B辑英文版)》1995,(3)
ANAPPLICATIONOFHARDY-BOEDEWADT'STHEOREMTOITERATEDFUNCTIONALEQUATIONSZhangWeinian(CentreforMathematicalSciences,CICAAcademiaSi... 相似文献
4.
ANOTEFORTHETOPOLOGICALCLASSIFICATIONOFSTRUCTURALLYSTABLEQUADRATICDIFFERENTIALSYSTEMSWITHOUTLIMITCYCLES¥YeWeiyin(叶惟寅)(NanjingN... 相似文献
5.
ONBAHADURASYMPTOTICEFFICIENCYINASEMIPARAMETRICREGRESSIONMODELLIANGHUA(梁华);CHENGPING(成平)(InstituteofSystemsScience,theChineseA... 相似文献
6.
TWONEWCONSTRUCTIONSOFCARTESIANAUTHENTICATIONCODESFROMSYMPLECTICGEOMETRYGAOYOUANDZOUZENGJIA(DepartmentofBasicScience,Northeast... 相似文献
7.
Yuan Rong 《数学年刊B辑(英文版)》1995,16(4):521-532
ALMOSTPERIODICSOLUTIONSOFNEUTRALFUNCTIONALDIFFERENTIALEQUATIONSWITHNONAUTONOMOUSOPERATOR¥YUANRONG(DepartmentofMathematics,Bei... 相似文献
8.
Zhang Linghai 《数学年刊B辑(英文版)》1998,19(1):35-58
UNIFORMSTABILITYANDASYMPTOTICBEHAVIOROFSOLUTIONSOF2-DIMENSIONALMAGNETOHYDRODYNAMICSEQUATIONSZHANGLINGHAIManuscriptreceivedJu... 相似文献
9.
YE YANQIAN * 《数学年刊B辑(英文版)》1997,(3)
LIMITCYCLESANDBIFURCATIONCURVESFORTHEQUADRATICDIFFERENTIALSYSTEM(II)m=0HAVINGTHREEANTISADDLES(I)YEYANQIANAbstractAsaconti... 相似文献
10.
Yin Yongcheng 《数学年刊B辑(英文版)》1994,15(3):373-384
SOME DYNAMICAL PROPERTIES OF QUADRATIC RATIONAL MAPSSOMEDYNAMICALPROPERTIESOFQUADRATICRATIONALMAPS¥YINYONGCHENG(CelltreforMat... 相似文献
11.
Johannes André 《Journal of Geometry》1992,43(1-2):22-29
Configurational conditions (Schließungsaussagen) of a noncommutative space will be developped from pairs (,
) of digraphs where is a partial digraph of
. In this way we obtain an extensive generalization of Pfalzgraf 's q-simplex-conditions Simq.In Memoriam Hans Zassenhaus 相似文献
12.
K. Tandori 《Analysis Mathematica》1980,6(2):157-164
. . . : sn(x) — , n-(, 1)- n
L
2. , . , :
a
k
l
2
n
() [0,1] , (*) , (**) .
a
k
l
2
u
n
() [0,1] , (**), (*) . 相似文献
13.
T. O. Kononovych 《Ukrainian Mathematical Journal》2004,56(9):1403-1416
We obtain upper bounds in terms of Fourier coefficients for the best approximation by an angle and for norms in the metric of L
p
for functions of two variables defined by trigonometric series with coefficients such that
as l
1 + l
2 and
for a certain p, 1 < p < .__________Translated from Ukrainskyi Matematychnyi Zhurnal, Vol. 56, No. 9, pp. 1182–1192, September, 2004. 相似文献
14.
15.
Yin Chen 《Integral Equations and Operator Theory》2001,41(3):255-263
Let (E
0,E
1) be a compatible couple of Banach spaces, and letE
: 0Re1 be the complex interpolation spaces ofE
0,E
1. LetT be a closed linear operator onE
0+E
1, then the restrictionT
ofT to eachE
is closed. If we denote by
the extended spectrum ofT
inE
, then, under appropriate conditions, it is shown that the map
is an analytic multifunction in the strip {C0<Re<1}. We use these results to give some applications to the spectral theory of semigroups. 相似文献
16.
On Kolmogorov-Type Inequalities Taking into Account the Number of Changes in the Sign of Derivatives
For 2-periodic functions
and arbitrary q [1, ] and p (0, ], we obtain the new exact Kolmogorov-type inequality
which takes into account the number of changes in the sign of the derivatives (x
(k)) over the period. Here, = (r – k + 1/q)/(r + 1/p),
r
is the Euler perfect spline of degree r,
and
. The inequality indicated turns into the equality for functions of the form x(t) = a
r
(nt + b), a, b R, n N. We also obtain an analog of this inequality in the case where k = 0 and q = and prove new exact Bernstein-type inequalities for trigonometric polynomials and splines. 相似文献
17.
A family of sequences has the Ramsey property if for every positive integerk, there exists a least positive integerf
(k) such that for every 2-coloring of {1,2, ...,f
(k)} there is a monochromatick-term member of . For fixed integersm > 1 and 0 q < m, let q(m) be the collection of those increasing sequences of positive integers {x
1,..., xk} such thatx
i+1 – xi q(modm) for 1 i k – 1. Fort a fixed positive integer, denote byA
t
the collection of those arithmetic progressions having constant differencet. Landman and Long showed that for allm 2 and 1 q < m,
q(m) does not have the Ramsey property, while
q(m)
A
m
does. We extend these results to various finite unions of
q(m)
's andA
t
's. We show that for allm 2,
q=1
m–1
q(m) does not have the Ramsey property. We give necessary and sufficient conditions for collections of the form
q(m)
(
t T
A
t) to have the Ramsey property. We determine when collections of the form a(m1) b(m2) have the Ramsey property. We extend this to the study of arbitrary finite unions of q(m)'s. In all cases considered for which has the Ramsey property, upper bounds are given forf
. 相似文献
18.
19.
For a bounded regular Jordan domain in R
2, we introduce and study a new class of functions K() related on its Green function G. We exploit the properties of this class to prove the existence and the uniqueness of a positive solution for the singular nonlinear elliptic equation u+(x,u)=0, in D(), with u=0 on and uC(), where is a nonnegative Borel measurable function in ×(0,) that belongs to a convex cone which contains, in particular, all functions (x,t)=q(x)t
–,>0 with nonnegative functions qK(). Some estimates on the solution are also given. 相似文献
20.
Sufficient conditions are found for the global solvability of the weighted Cauchy problem
where f : C([a, b]; R
n) L
loc([a, b]; R
n) is a singular Volterra operator, c
0
R
n, h : [a, b] [0, +] is a function continuous and positive on [a, b], and · is the norm in R
n. 相似文献