A maximal inequality associated to Schr\{o}dinger type equation.
A maximal inequality associated to Schr\{o}dinger type equation.
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DOI:
10.14492/hokmj/1285766429
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
Yonggeun Cho;Sanghyuk Lee;Y. Shim
中科院分区:
文献类型:
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作者:
Yonggeun Cho;Sanghyuk Lee;Y. Shim
In this note, we consider a maximal operator $\sup_{t \in \mathbb{R}}|u(x,t)| = \sup_{t \in \mathbb{R}}|e^{it\Omega(D)}f(x)|$, where $u$ is the solution to the initial value problem $u_t = i\Omega(D)u$, $u(0) = f$ for a $C^2$ function $\Omega$ with some growth rate at infinity. We prove that the operator $\sup_{t \in \mathbb{R}}|u(x,t)|$ has a mapping property from a fractional Sobolev space $H^\frac14$ with additional angular regularity to $L_{loc}^2$.