在矩形域上研究了一类具有转向线的奇摄动二阶线性椭圆方程的边值问题.在坐标变换的基础上,利用分离变量法和匹配法,得到了一类二阶线性非齐次常微分方程.通过分析奇摄动常微分方程产生共振的充分条件和必要条件,确定了二阶线性椭圆方程边值问题解的渐近性态.
We discuss a class of boundary value problems of the singular perturbation elliptic equations with a turning line on a rectangle region. On the basis of coordinate transformation, the second-order nonhomogeneous ordinary dierential equations are obtained by using methods of separation of variables and matching asymptotic expansions. Through considering the suffcient and necessary conditions at resonance for the singular perturbation ordinary differential equations, the asymptotic behaviors of the solutions for the boundary value problems of two-order elliptic equations are also evaluated.