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arXiv 2103.16666math.CA
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涉及第一类修正Lommel函数的积分的界

Bounds for an integral involving the modified Lommel function of the first kind

Robert E. Gaunt

摘要:

为积分$\int_0^x\mathrm{e}^{-βu}u^νt_{μ,ν}(u)\,\mathrm{d}u$建立简单的上界和下界,其中$x>0$、$0<β<1$、$μ+ν>-2$、$μ-ν\geq-3$和$t_{μ,ν}(x)$是第一类修正的Lommel函数。我们的边界补充和改善现有的边界,这个积分,无论是尖锐的或增加的有效性范围。我们的边界还概括了涉及第一类修改的斯特鲁夫函数的积分的最近边界,并且在某些情况下,当我们的一般边界专门用于修改的斯特鲁夫情况时,更直接的方法会导致更尖锐的边界。

英文摘要:

Simple upper and lower bounds are established for the integral $\int_0^x\mathrm{e}^{-βu}u^νt_{μ,ν}(u)\,\mathrm{d}u$, where $x>0$, $0<β<1$, $μ+ν>-2$, $μ-ν\geq-3$, and $t_{μ,ν}(x)$ is the modified Lommel function of the first kind. Our bounds complement and improve on existing bounds for this integral, by either being sharper or increasing the range of validity. Our bounds also generalise recent bounds for an integral involving the modified Struve function of the first kind, and in some cases more a direct approach lead to sharper bounds when our general bounds are specialised to the modified Struve case.

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