From spherical harmonics to a sharp multiplier theorem on the Grushin sphere
From spherical harmonics to a sharp multiplier theorem on the Grushin sphere
复制标题
从球谐函数到格鲁申球上的锐乘子定理
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
Alessio Martini
中科院分区:
文献类型:
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作者:
Valentina Casarino;P. Ciatti;Alessio Martini
We prove a sharp multiplier theorem of Mihlin-H"ormander type for the Grushin operator on the unit sphere in $mathbb{R}^3$, and a corresponding boundedness result for the associated Bochner-Riesz means. The proof hinges on precise pointwise bounds for spherical harmonics.