讨论退化秩为0的二阶非线性混合型方程的Tricomi问题,先给出这个问题的提法,得到了解的表示式,然后由逐次叠代的方法和列 紧性原理证明这个问题解的存在性.
The present paper deals with the Tricomi problem for second order nonlinear mixed equations with degenerate rank O. Firstly the formulation of the problem for the equations is proposed, secondly the representation of solutions for the above problem is obtained, finally the existence of solutions for the problem is proved by the successive iteration and the method of parameter extension.