Pointwise convergence of vector-valued Fourier series
Pointwise convergence of vector-valued Fourier series
复制标题
矢量值傅立叶级数的逐点收敛
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
M. Lacey
中科院分区:
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作者:
T. Hytönen;M. Lacey
We prove a vector-valued version of Carleson’s theorem: let $$Y=[X,H]_ heta $$ be a complex interpolation space between an unconditionality of martingale differences (UMD) space $$X$$ and a Hilbert space $$H$$. For $$pin (1,infty )$$ and $$fin L^p(mathbb T ;Y)$$, the partial sums of the Fourier series of $$f$$ converge to $$f$$ pointwise almost everywhere. Apparently, all known examples of UMD spaces are of this intermediate form $$Y=[X,H]_ heta $$. In particular, we answer affirmatively a question of Rubio de Francia on the pointwise convergence of Fourier series of Schatten class valued functions.