树作为一类简单而特殊的图，对它的特征值的研究能帮助了解谱的一些代数性质。
As tree is an easy and special graph, the study of its eigenvalue can help understand some algebra nature of spectrum.
稳定问题可分为两类，第一类稳定问题计算简单，最后可归结为特征值的问题，具有重要的工程意义。
The stability issues include two categories. The first stability issue which can be attributed to Eigen value problem is easy to calculation and have a great important to the engineering.
本文对一类特殊矩阵的逆矩阵和特征值问题进行了研究，并得出了一个求该类矩阵的逆的一个公式，用该公式求这类矩阵的逆比用现有的方法要简单的多。
In this paper, an inversion and Eigenvalue problem of a matrix are studied, and a formula of matrix inversion which is much simpler than the existing methods is put out.
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