CAJ | 학술논문

本文给出了在相同的三种变换下将三个二阶方阵的对称化部分同时化为正定的条件，从而证明了一类二阶常系数线性椭圆型方程组能化为强椭圆型方程组，并利用这一结论证明了这类方程组在有界闭区域上Dirichlet问题解的是唯一的。
본문급출료재상동적삼충변환하장삼개이계방진적대칭화부분동시화위정정적조건，종이증명료일류이계상계수선성타원형방정조능화위강타원형방정조，병이용저일결론증명료저류방정조재유계폐구역상Dirichlet문제해적시유일적。
This paper gives a condition that the symmetry part of three two-order matrixes can be changed into positive matrixes under the same three kinds of transformation,there for,it is proved that a class of the two-order linear elliptical equations with constant coefficient can be changed into strongly elliptical equations.By use of this result,the uniqueness of the solution about the Dirichlet problem in bounded closed domain for this kind of equations is confirmed.