对一类极小谱任意符号模式的刻画

摘要

A class of spectrally arbitrary sign patterns with 2n nonzero entries is studied. The sign pattern is proved to be spectrally arbitrary by using nilpotent-Jacobian method, and the given sign pattern is minimally spectrally arbitrary.%对一类含有2n 个非零元的符号模式矩阵进行研究，运用了幂零–雅可比方法证明了该类符号模式矩阵是谱任意的，并进一步证明了该符号模式是极小谱任意的。