Harnack inequalities in infinite dimensions
Harnack inequalities in infinite dimensions
复制标题
无限维哈纳克不等式
DOI:
10.1016/j.jfa.2012.09.009
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发表时间:
2012
影响因子:
1.7
通讯作者:
Gordina, Maria
中科院分区:
文献类型:
--
作者:
Bass, Richard F.;Gordina, Maria
We consider the Harnack inequality for harmonic functions with respect to three types of infinite-dimensional operators. For the infinite-dimensional Laplacian, we show no Harnack inequality is possible. We also show that the Harnack inequality fails for a large class of Ornstein–Uhlenbeck processes, although functions that are harmonic with respect to these processes do satisfy an a priori modulus of continuity. Many of these processes also have a coupling property. The third type of operator considered is the infinite-dimensional analog of operators in Hörmanderʼs form. In this case a Harnack inequality does hold.
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