Area Integral Means of Analytic Functions in the Unit Disk
Area Integral Means of Analytic Functions in the Unit Disk
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DOI:
10.4153/cmb-2017-053-3
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发表时间:
2017-08
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影响因子:
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通讯作者:
Xiaohui Cui;Chunjie Wang;Kehe Zhu
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文献类型:
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作者:
Xiaohui Cui;Chunjie Wang;Kehe Zhu
Abstract For an analytic function $f$ on the unit disk $\mathbb{D}$ , we show that the ${{L}^{2}}$ integral mean of $f$ on $\text{c}\,\text{}\,\text{ }\!\!|\!\!\text{ z }\!\!|\!\!\text{ }\,\text{}\,\text{r}$ with respect to the weighted area measure ${{\left( 1\,-\,|z{{|}^{2}} \right)}^{\alpha }}dA\left( z \right)$ is a logarithmically convex function of $r$ on $\left( c,\,1 \right)$ , where $-3\,\le \,\alpha \,\le \,0\,\text{and}\,\text{c}\,\in \,[\,0,\,1)$ . Moreover, the range $[-3,\,0]$ for $\alpha $ is best possible. When $c\,=\,0$ , our arguments here also simplify the proof for several results we obtained in earlier papers.