arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.06012math.APmath.PR
收藏

一类退化Kolmogorov算子Lp和Schauder估计中的泊松过程和锐常数

Poisson process and sharp constants in Lp and Schauder estimates for a class of degenerate Kolmogorov operators

L. Marino, S. Menozzi, E. Priola

摘要:

考虑一个可能退化的Kolmogorov-Ornstein-Uhlenbeck算子L = Tr(BD 2)+ Az,D,其中A,B是N × N矩阵,z $\in$ RN,N $\ge$ 1满足与亚椭圆性条件等价的Kalman条件.我们证明了以下稳定性结果:对于L的二阶摄动的抛物型Cauchy问题,即对于L + Tr(S(t)D2),相应的抛物型Cauchy问题的Schauder和Sobolev估计仍然有效,且具有相同的常数,其中S(t)是一个连续依赖于t $\ge$ 0的非负N × N矩阵.我们的方法依赖于基于[15]中介绍的泊松过程的微扰技术。

英文摘要:

We consider a possibly degenerate Kolmogorov-Ornstein-Uhlenbeck operator of the form L = Tr(BD 2) + Az, D , where A, B are N x N matrices, z $\in$ R N , N $\ge$ 1, which satisfy the Kalman condition which is equivalent to the hypoellipticity condition. We prove the following stability result: the Schauder and Sobolev estimates associated with the corresponding parabolic Cauchy problem remain valid, with the same constant, for the parabolic Cauchy problem associated with a second order perturbation of L, namely for L + Tr(S(t)D 2) where S(t) is a non-negative N x N matrix depending continuously on t $\ge$ 0. Our approach relies on the perturbative technique based on the Poisson process introduced in [15].

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑