Note on the Hölder norm estimate of the function xsin⁡(1/x)x\sin(1/x)

preprint2014arXivOpen access

Abstract

In this paper, we prove the following inequality: for any x,y>0x, y>0, there holds ∣xsin⁡1x−ysin⁡1y∣≤2∣x−y∣.\big|x\sin\frac{1}{x} - y\sin\frac{1}{y} \big| \leq \sqrt{2|x - y|}.

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