For a class of uncertain linear time-invariant systems whose characteristic polynomials are described by the so-called simplex polynomial family, their left-sector stability can be verified by avery simple criterion.
对于一类特征多项式由单形多项式族描述的不确定系统，其左扇形稳定性可由一个非常简单的判据加以检验，对于低阶系统，这一判据还可进一步简化。
Tight monomials are the simplest elements in the canonical basis.
紧单项式是典范基中最简单的元素 。
Through the analysis, the author obtains some normality criteria concerning function’s derivative and differential monomials,which extends existing results.
涉及函数导数的亚纯函数的正规性问题一直是亚纯函数论颇为活跃的研究课题,在本文中主要运用Nevanlinna值分布理论和正规族理论,继续研究了涉及函数导数的亚纯函数的正规性问题,得到了涉及函数导数和微分单项式的亚纯函数的几个正规定则,完善和推广了现有的一些结果。