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arXiv 1905.07151math.AP
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具有齐次位势的Kramers-Fokker-Planck算子

Kramers-Fokker-Planck operators with homogeneous potentials

Mona Ben Said

摘要:

本文在一定条件下建立了具有齐次位势$V(q)$的Kramers-Fokker-Planck算子的整体亚椭圆估计,特别涉及到位势的黑塞矩阵特征值的控制.在[Ben]中,$V (q_1, q _2) =-q ^2_1 (q^ 2_1+q^2_2) ^n$只对$n=1.$进行了处理。本文在[Ben]中处理了非齐次多项式势之后,对[HeNi]中Helffer和Nier在Witten Laplacian框架下提出的无穷远处退化椭圆性的所有例子进行了分析。像在[本],我们的次椭圆下界是最佳的一些对数校正。

英文摘要:

In this article we establish a global subelliptic estimate for Kramers-Fokker-Planck operators with homogeneous potentials $V(q)$ under some conditions, involving in particular the control of the eigenvalues of the Hessian matrix of the potential. Namely, this work presents a different approach from the one in [Ben], in which the case $V (q_1, q _2) =-q ^2_1 (q^ 2_1+q^2_2) ^n$ was already treated only for $n=1.$ With this article, after the former one dealing with non homogeneous polynomial potentials, we conclude the analysis of all the examples of degenerate ellipticity at infinty presented in the framework of Witten Laplacian by Helffer and Nier in [HeNi]. Like in [Ben], our subelliptic lower bounds are the optimal ones up to some logarithmic correction.

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。

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