三角多项式不等式

Eufisky posted @ 2015年10月02日 04:23 in 数学分析 with tags 不等式三角多项式 , 934 阅读

逻辑丁的提问:证明\[\sum\limits_{k = 1}^{+\infty} {\frac{{\sin kx}}{{{k^a}}}} > 0,x \in \left( {0,\pi } \right),a \in \left( {0,\frac{1}{2}} \right]\]证明在$(0,\pi)$上勒贝格可积.

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2023年4月17日 22:42

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