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The Endpoint Estimate for Fourier Integral Operators
Acta Mathematica Scientia ( IF 1 ) Pub Date : 2021-01-29 , DOI: 10.1007/s10473-021-0207-0
Guangqing Wang , Jie Yang , Wenyi Chen

Let Ta,ϕ be a Fourier integral operator defined by the oscillatory integral

$${T_{a,\varphi }}u(x) = {1 \over {{{(2\pi )}^n}}}\int_{{^n}} {{e^{{\rm{i}}\varphi (x,\xi )}}} a(x,\xi )\hat u(\xi ){\rm{d}}\xi,$$

where\(a \in S_{\varrho,\delta }^m\) and ϕ ∈ Φ2, satisfying the strong non-degenerate condition. It is shown that if 0 < ϱ ≤ 1, 0 ≤ δ < 1 and \( \le {{{\varrho ^2} - n} \over 2}\), then Ta,ϕ is a bounded operator from L(ℝn) to BMO(ℝn).



中文翻译:

傅里叶积分算子的端点估计

T a,ϕ为由振荡积分定义的傅立叶积分算子

$$ {T_ {a,\ varphi}} u(x)= {1 \ over {{{(2 \ pi}} ^ n}}} \ int _ {{^ n}} {{e ^ {{\ rm {i}} \ varphi(x,\ xi)}}}} a(x,\ xi)\ hat u(\ xi){\ rm {d}} \ xi,$$

其中\(一个处于S \ _ {\ varrho,\增量} ^ M \)φ&Element;Φ 2,满足强的非简并状态。结果表明,如果0 <ρ≤1,0≤ δ <1和\(\文件{{{\ varrho ^ 2} - N} \超过2} \),然后Ť一个,φ是从有界运算符大号(ℝ ñ)到BMO(ℝ ñ)。

更新日期:2021-01-29
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