Generalized Eigenvector 广义特征向量k >= 1, Ordinary eigenvectors are obtained for k=1.
In linear algebra, a defective matrix is a square matrix that does not have a complete basis of eigenvectors, and is therefore not diagonalizable. In particular, for an n * n matrix, the matrix is defective if (and only if) it does not have n linearly independent eigenvectors. A complete basis is formed by augmenting the eigenvectors with generalized eigenvectors, which are necessary for solving defective systems of ordinary differential equations and other problems.