From refined estimates for spherical harmonics to a sharp multiplier theorem on the Grushin sphere
From refined estimates for spherical harmonics to a sharp multiplier theorem on the Grushin sphere
复制标题
从球谐函数的精确估计到格鲁辛球上的锐乘子定理
DOI:
10.1016/j.aim.2019.05.003
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发表时间:
2019
影响因子:
1.7
通讯作者:
Casarino V
中科院分区:
文献类型:
--
作者:
Casarino V
We prove a sharp multiplier theorem of Mihlin–Hörmander type for the Grushin operator on the unit sphere in R 3, and a corresponding boundedness result for the associated Bochner–Riesz means. The proof hinges on precise pointwise bounds for spherical harmonics.