On the interpolation constant for subadditive operators in Orlicz spaces
On the interpolation constant for subadditive operators in Orlicz spaces
复制标题
关于 Orlicz 空间中次加法算子的插值常数
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
L. Maligranda
中科院分区:
文献类型:
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作者:
A. Karlovich;L. Maligranda
Let $1le p<qleinfty$ and let $T$ be a subadditive operator acting on
$L^p$ and $L^q$. We prove that $T$ is bounded on the Orlicz space
$L^phi$, where $phi^{-1}(u)=u^{1/p}
ho(u^{1/q-1/p})$ for some concave function $
ho$ and [ |T|_{L^phi o L^phi}le Cmax{|T|_{L^p o L^p},|T|_{L^q o L^q}}. ] The interpolation constant $C$, in general, is less than 4 and, in many cases, we can give much better estimates for $C$. In particular, if $p=1$ and $q=infty$, then the classical Orlicz interpolation theorem holds for subadditive operators with the interpolation constant C=1. These results generalize our results for linear operators obtained in cite{KM01}.