THE GLOBAL SOLUTIONS FOR A FOURTH ORDER NONLINEAR SCHRaINGER EQUATION

Is this Paper, the global existence of smooth solutions to the Antial value problem for the fourth order nonlinear Schrodinger equation in the Lax hierarchy of the nonlinear fSchrodinger equation(NLS equation) is established by using the so-called continuation method and delicate a priori estimate. In addition, the asylnptotic properties of the solutions as|×|+∞ are discussed.

一类非线性伪抛物型方程的初边值问题

研究了一类非线性伪抛物型方程的初边值问题。首先利用了经典的Galerkin方法的思想,构造了原问题的近似解,并对非线性伪抛物型方程中的非齐次项函数限定了如下条件:f′下方有界且g′上方有界,得到了近似解的几个先验估计;然后证明了原问题整体弱解的存在性与唯一性;最后利用Poincare不等式及Gronwall不等式,得到了问题整体广义解的渐近性质。