学科分类
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2 个结果
  • 简介:LetP(z)beapolynomialofdegreen,havingallitszerosin|z|≤1Inthispaper,weestimatekthpolarderivativeofP(z)on|z|=1andtherebyobtaincompactgeneralizationsofsomeknownresultswhichamongotherthingsyieldsarefinementofaresultduetoPaulTura'n.

  • 标签: 衍生品 多项式 不等式 极地 估计
  • 简介:LetP(z)beapolynomialofdegreenandforanycomplexnumberα,letDαP(z)=nP(z)+(α-z)P′(z)denotethepolarderivativeofP(z)withrespecttoα.Inthispaper,weobtaincertaininequalitiesforthepolarderivativeofapolynomialwithrestrictedzeros.Ourresultsgeneralizeandsharpensomewell-knownpolynomialinequalities.

  • 标签: 多项式 衍生物 极地 DELTA 极性 复数