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Identification of anisotropic mixed-norm Hardy spaces and certain homogeneous Triebel–Lizorkin spaces
Journal of Approximation Theory ( IF 0.9 ) Pub Date : 2020-07-25 , DOI: 10.1016/j.jat.2020.105459
Long Huang , Jun Liu , Dachun Yang , Wen Yuan

Let S(Rn) be the Schwartz class on Rn and S(Rn)ϕS(Rn):Rnxαϕ(x)dx=0for any multi-indexα({0,1,})n,and S(Rn) and S(Rn) be their dual spaces, respectively. Let a(a1,,an)[1,)n, p(p1,,pn)(0,1]n, and Hap(Rn)S(Rn) be the anisotropic mixed-norm Hardy space, associated with an anisotropic quasi-homogeneous norm ||a, defined via the non-tangential grand maximal function. In this article, via the known atomic characterizations and Lusin area function characterizations of Hap(Rn), the authors first establish a new atomic characterization of Hap(Rn) in terms of S(Rn). Applying this atomic characterization, the authors then obtain the Littlewood–Paley g-function characterization of Hap(Rn) in terms of S(Rn), which further induces the identification of Hap(Rn) and certain anisotropic homogeneous mixed-norm Triebel–Lizorkin spaces. As applications, the authors obtain the dual theorem on some anisotropic homogeneous mixed-norm Triebel–Lizorkin spaces and the boundedness of Fourier multipliers as well as anisotropic pseudo-differential operators on Hap(Rn). All these results are new even for isotropic mixed-norm Hardy spaces on Rn.



中文翻译:

各向异性混合范数Hardy空间和某些齐次Triebel-Lizorkin空间的识别

小号[Rñ 成为施瓦茨课程 [Rñ小号[Rñϕ小号[Rñ[RñXαϕXdX=0对于任何多索引α{01个}ñ小号[Rñ小号[Rñ分别是它们的双重空间。让一种一种1个一种ñ[1个ñpp1个pñ01个]ñH一种p[Rñ小号[Rñ 是各向异性混合范式Hardy空间,与各向异性拟齐范数相关 ||一种,是通过非切线的Grand max函数定义的。在本文中,通过已知的原子表征和Lusin面函数表征H一种p[Rñ,作者首先建立了一个新的原子表征 H一种p[Rñ 就......而言 小号[Rñ。应用这种原子特性,作者便获得了Littlewood–PaleyG的功能表征 H一种p[Rñ 就......而言 小号[Rñ,这进一步导致了对 H一种p[Rñ以及某些各向异性的齐次混合规范Triebel–Lizorkin空间。作为应用,作者获得了一些各向异性齐次混合范Triebel-Lizorkin空间上的对偶定理,以及Fourier乘子的有界性以及各向异性伪微分算子在H一种p[Rñ。所有这些结果,即使对于上的各向同性混合范数Hardy空间,也是新的[Rñ

更新日期:2020-07-25
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