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arXiv 1504.00385math.FAmath.CA
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英厄姆定理的量化形式

Quantified versions of Ingham's theorem

Ralph Chill, David Seifert

摘要:

我们获得量化版本的英厄姆的经典Tauberian定理和它的一些变种通过一个自然的修改英厄姆自己的简单证明。作为主要一般结果的推论,我们得到了$C_0$ -半群的量化衰减估计。结果重现那些已知的文献,但都更一般,在一种情况下,尖锐。他们也导致了更好地理解以前模糊的“捏造因素”出现在证明的基础上估计轮廓积分。

英文摘要:

We obtain quantified versions of Ingham's classical Tauberian theorem and some of its variants by means of a natural modification of Ingham's own simple proof. As corollaries of the main general results, we obtain quantified decay estimates for $C_0$-semigroups. The results reproduce those known in the literature but are both more general and, in one case, sharper. They also lead to a better understanding of the previously obscure "fudge factor' appearing in proofs based on estimating contour integrals.

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