摘要
LetP(z)beapolynomialofdegreenandforanycomplexnumbera,letDaP(z)=nP(z)+(a-z)P′(z)denotethepolarderivativeofthepolynomialP(z)withrespecttoa.Inthispaper,weobtaininequalitiesforthepolarderivativeofapolynomialhavingallzerosinsideacircle.Ourresultsshallgeneralizeandsharpensomewell-knownresultsofTuran,Govil,Dewanetal.andothers.
出版日期
2015年03月13日(中国期刊网平台首次上网日期,不代表论文的发表时间)