用p-adic数域上的傅里叶变换刻画希尔伯特空间
Characterizing Hilbert spaces using Fourier transform over the field of p-adic numbers
摘要:
利用$p$ -进数域$Q_p$上向量值函数的傅里叶变换,在全体巴拿赫空间类中刻画了希尔伯特空间.巴拿赫空间$X$同构于Hilbert空间当且仅当在Bochner意义下平方可积且取值于$X$的函数空间中的傅里叶变换$F: L_2(Q_p,X)\to L_2(Q_p,X)$是有界算子.
英文摘要:
We characterize Hilbert spaces in the class of all Banach spaces using Fourier transform of vector-valued functions over the field $Q_p$ of $p$-adic numbers. Precisely, Banach space $X$ is isomorphic to a Hilbert one if and only if Fourier transform $F: L_2(Q_p,X)\to L_2(Q_p,X)$ in space of functions, which are square-integrable in Bochner sense and take value in $X$, is a bounded operator.
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