检索结果-南通市图书馆

THE STABILITY OF THE PERIODIC SOLUTIONS OF SECOND ORDER HAMILTONIAN SYSTEMS

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of mathematics,Series B 2000年第2期21卷 225-232页

作者： LIU CHUNGEN(department of mathematics,{2., tianjin 300071. china.) department of mathematics Nankai University Tianjin 300071 China

This paper studies the stability of the periodic solutions of the second order Hamiltonian systems with even superquadratic or subquadratic potentials. The author proves that in the subquadratic case, there exist infinite geometrically distinct elliptic periodic solutions, and in the superquadratic case, there exist infinite geometrically distinct periodic solutions with at most one instability direction if they are half period non-degenerate, otherwise they are elliptic.

关键词： Krein type Stability Periodic elliptic solution Hamitonian systems

THE FULL DISCRETE DISCONTINUOUS FINITE ELEMENT ANALYSIS FOR FIRST-ORDER LINEAR HYPERBOLICEQUATION

在线全文

学校读者我要写书评

暂无评论

Journal of Computational mathematics 1999年第1期17卷 97-112页

作者： Che Sun Shu-jie Qin(department of mathematics,{2., tianjin 300071. china) nankai Univ Dept Math Tianjin 300071 Peoples R China

In this paper, the full discrete discontinuous Galerkin finite element method to solove 2.dimensional first-order linear hyperbolic problem is considered. Two practical schemes, Euler scheme and Crank-Nicolson scheme, are constructed. For each of them, the stability and error estimation with optimal order approximation is established in the norm stronger than L-2.norm.

关键词： hyperbolic equation discontinuous FEM Euler scheme

On homotopy regular monomorphisms

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第1期43卷 27-30页

作者： CHEN Jixiang department of mathematics,{2., tianjin 300071. china department of mathematics Nankai University Tianjin China

A concept of homotopy regular monomorphism is introduced which is strictly between homotopy monomorphism and homotopy equivalence. And it characterizes homotopy equivalence in some sense.

关键词： homotopy monomorphism homotopy equalizer homotopy regular monomorphism homotopy pull back.

Automorphisms with order three of affine Lie algebras

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第21期43卷 1793-1798页

作者： JIN Quanqin 1,2.and HOU Zixin 2.1. department of mathematics, Hebei {2., Baoding 071002. china 2. department of mathematics, nankai university, tianjin 300071. china department of mathematics Hebei University Baoding China department of mathematics Nankai University Tianjin China

Some properties of automorphisms of affine Lie algebras are presented. Automorphisms with order three are classified up to conjugacy, and their fixed point sets are also computed. As a corollary, it is proved that two... 详细信息

关键词： affine Lie algebra automorphism of order three first (second) kind of automorphism.

New Families in the Stable Homotopy of Spheres Revisited

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2002年第1期18卷 95-106页

作者： LIN Jin Kun department of mathematics.{2.. tianjin 300071. P. R. china department of mathematics Nankai University Tianjin P. R. China

This paper constructs a new family in the stable homotopy of spheres π_(t-)S represented by h_ngoY_3 ∈E_2.6(,t) in the Adams spctral sequence which revisits the b_(n-1goY3)-elements ∈π_(-7)S con- structced in[3]. ... 详细信息

关键词： Stable homotopy of spheres Adams spectral sequence Toda-Smith spectrum Adams resolution

Another solution of Yang-Baxter equation on set and "metahomomorphisms on groups

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第22期42卷 1852-1855页

作者： GU Peidepartment of mathematics,{2., tianjin 300071. china department of mathematics Nankai University Tianjin China

1 Another solution of Yang-Baxter equation on setIN ref [1], Drinfeld said that up to now there exist just two examples on the solution R of theYang-Baxter

关键词： Yang-Baxter equation solution metahomomorphism finite simple group.

Induction-by-stages of Dixmier algebras and orbit datum and its application

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第10期43卷 818-820页

作者： LIANG Ke department of mathematics,{2., tianjin 300071. china department of mathematics Nankai University Tianjin China

The purpose of the present note is to prove that the parabolic inductions of the orbit datum and Dixmier algebras can be induced by stages. And as an appliction, we have proved that for SO(2.+1, C), SP(2., C), F\-4 an... 详细信息

关键词： dixmier algebra orbit data representation of Lie group.

Minimal symmetric submanifolds in compact Riemannian symmetric spaces

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第21期43卷 1786-1789页

作者： LIANG Ke 1 and JIN Quanqin 1,2.1. department of mathematics,{2., tianjin 300071. china 2. department of mathematics, Hebei university, Baoding 071002. china department of mathematics Nankai University Tianjin China department of mathematics Hebei University Baoding China

A necessary and sufficient condition for a symmetric submanifold to be minimal in its ambient compact Riemannian symmetric space is given. By this condition a complete classification of non- minimal symmetric submanif... 详细信息

关键词： symmetric space symmetric submanifold mean curvature vector.

Irregular wavelet frames on L^2.(R^n)

在线全文

学校读者我要写书评

暂无评论

Science china mathematics 2005年第2期48卷 277-287页

作者： YANG Deyun & ZHOU Xingwei department of Information & Technology, nankai university,{2. department of mathematics, nankai university,{2. department of Computer Science, Taishan College, Taian 2.1000, china 1. department of Information & Technology Nankai University 300071 Tianjin China 2. department of mathematics Nankai University 300071 Tianjin China 3. department of Computer Science Taishan College 271000 Taian China

In this paper, we present the conditions on dilation parameter {sj}j that ensure a discrete irregular wavelet system to be a frame on L2.Rn), and for the wavelet frame we consider the perturbations of translation para... 详细信息

关键词： wavelet transform, frame, wavelet frame, irregular dilation.