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arXiv 1810.05693math.CA
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关于实轴上power functions的逆赫尔德不等式的推广

On the extension of the Reverse Hölder Inequality for power functions on the real axis

Alina Shalukhina

摘要:

本文考虑一类$\mathbb{R_+}$上的非负函数,使得每个函数在所有区间上一致满足逆赫尔德不等式,其中某个常数的最小值可以看作函数的相应“范数”.我们比较了这个“范数”与从$\mathbb{R_+}$到$\mathbb{R}.$的函数的偶扩张的“范数”,得到了这类“范数”之比的上估计。在$\mathbb{R_+}$上的幂函数的特殊情况下,给出了其偶延拓的“范数”增加的精确值。在任意函数的情况下,该值是类似值的较低估计。结果表明,在一般情况下,所得到的上、下估计是渐近尖锐的。

英文摘要:

We consider the class of all non-negative on $\mathbb{R_+}$ functions such that each of them satisfies the Reverse Hölder Inequality uniformly over all intervals with some constant the minimum value of which can be regarded as the corresponding "norm" of a function. We compare this "norm" with the "norm" of an even extension of a function from $\mathbb{R_+}$ on $\mathbb{R}.$ In this paper the upper estimate for the ratio of such "norms" has been obtained. In the particular case of power functions on $\mathbb{R_+}$ the precise value of the increase of the "norm" of its even extension is given. This value is the lower estimate for the analogous one in the case of arbitrary functions. It has been shown that the obtained upper and lower estimates for the general case are asymptotically sharp.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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