Uniform geometric estimates of sublevel sets

Uniform geometric estimates of sublevel sets
复制标题

子水平集的统一几何估计

DOI:
--
复制
发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Philip T. Gressman
Philip T. Gressman
中科院分区:
--
文献类型:
--
作者:
Philip T. Gressman

文献摘要

被引文献

相似文献

本文从几何角度重新考虑了Carbery, Christ, and Wright[7]、Phong, Stein, and Sturm[7]和Carbery and Wright[8]的一致子水平集估计。这个观点引导我们考虑一个自然的齐次非线性微分算子的集合,它推广了在t中的混合导数。结果表明,与这些先前的工作相比,除了某些明确的“平坦”情况外,改进的统一估计在所有情况下都是可能的。
This paper reconsiders the uniform sublevel set estimates of Carbery, Christ, and Wright [7], Phong, Stein, and Sturm [23], and Carbery and Wright [8] from a geometric perspective. This perspective leads one to consider a natural collection of homogeneous, nonlinear differential operators, which generalize mixed derivatives in ℝd. As a consequence, it is shown that, in comparison to these previous works, improved uniform estimates are possible in all but certain explicitly “flat” situations.