SUFFICIENT_CONDITIONS

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相关机构：东南大学山东矿业学院贵州大学南京师范大学更多>>
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On Sufficient Conditions for p-valently Starlikeness
《Chinese Quarterly Journal of Mathematics》2010年第2期198-207,共10页XU Neng 
Supported by the Natural Science Foundation of Jiangsu Education Department（06KJD110003）
Let An(p)(p,n ∈ N = {1,2,3,...}) denote the class of functions of the form f(z) = zp +ap+nzp+n +...which are analytic in the unit disk E = {z:|z| < 1}.A function f(z) in A(p) is said to be in the class Sp(a,b) if it ...
关键词：analytic function STARLIKENESS SUBORDINATION 
Some Sufficient Conditions of a Solvable Group
《Chinese Quarterly Journal of Mathematics》2006年第3期351-357,共7页WANG Li-fang ZHANG Qin-hai 
Supported by the NSF of China(10471085) Supported by the Shanxi Province(20051007) Supported by the Returned Chinese Students Found of Shanxi Province(Jinliuguanban [2004]7)
A subgroup H of a group G is called semipermutable if it is permutable with every subgroup K of G with （｜H｜, ｜K｜） = 1, and s-semipermutable if it is permutable with every Sylow p-subgroup of G with （p, ｜H｜） ...
关键词：a solvable group a s-semipermutable subgroup a semipermutable subgroup 
On Sufficient Conditions for p-valently Close-to-convexity
《Chinese Quarterly Journal of Mathematics》2003年第3期271-275,共5页XU Neng (Department of Mathematics, Changshu College, Changshu 215500, China) 
Let A p(n)(p, n∈N=｛1,2,…｝) denote the class of functions of the form f(z)=z p+a p+n z p+n +… which are analytic in the unit disc E=｛z:｜z｜<1｝. By using the method of differential subordinati ons we give some s...
关键词：analytic functions p-valently close-to-convex ity functions SUBORDINATION 
Sufficient Conditions for the Existence of Periodic Solution of Liènard Equattion
《Chinese Quarterly Journal of Mathematics》1993年第1期72-76,共5页曹登庆 
G.Villar's Method^[4] is improved to prove theorems for the existence of periodic solution(limit cycles of Liènard equation and a more general class of nonlinear differential equations.The results obtained in this pa...
关键词：充分条件 周期解 存在性 Liènard方程 非线性常微分方程 相平面分析 G.Villar方法 
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