THE SERIES SOLUTION OF THE GEL'FAND-LEVITAN-MARCHENKO EQUATION

The convergence of the Neumann series solution of the Gel'fand-Levitan-Marchenko equation in L~∞[0, ∞), L~1[0, ∞) and L~2[0, ∞) is proved and the explicit expression of the series solution is given.     

非线性Schrdinger方程孤立子解的一般稳定性理论

自从Garduer,C.S.,Greem,J.M.,Kruskal M.D.和Miura,R,M,用反散射方法(ISM)求解KdV方程u_t—6uu_x u_(xxx)=0而获得孤立子解的论文发表以来[1],由于孤立子的概念以及所提供的研究方法在数学、物理,特别在近代物理(如等离子体物理,固体物理等)中的应用日广而得到较大地发展。近代物理实验和理论研究中一个颇为人们关注的问题是在一定意义的扰动下孤立子解的稳定性[11]。     

A CONFORMAL SUPFRUNIFIED THEORY

In this paper we have established a superspace U for supergauge actions, constructed a confermal supergroup SU (2, 2|N) and a conformal extended SU (2, 2|N) supergravity theory. Using the Lagrangian Higgs evolution mechanism under the supergroup SU(2, 2|N)SU(N)actions on the superspace U, we have advanced a SU(2, 2|N)SU superunified theory of a superunited system, discussed the Lagrangian evolution of the superunified theory, and given the fiber bundle geometry of all above mechanisms.     

KdV方程的特征速度的Lax猜想的证明

本文证明Lax提出的对KdV方程u_l+6uu_x+u_xxx=0的如下猜想:存在N个正常数ci,j=1,2,…,N和2N个常数θ_i^±,j=1,2,…N对方程的任一解u(x,t)有其中S为一孤立波。