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Heat kernel upper bounds for symmetric Markov semigroups
Journal of Functional Analysis ( IF 1.7 ) Pub Date : 2021-04-24 , DOI: 10.1016/j.jfa.2021.109074 Zhen-Qing Chen , Panki Kim , Takashi Kumagai , Jian Wang
中文翻译:
对称马尔可夫半群的热核上限
更新日期:2021-04-24
Journal of Functional Analysis ( IF 1.7 ) Pub Date : 2021-04-24 , DOI: 10.1016/j.jfa.2021.109074 Zhen-Qing Chen , Panki Kim , Takashi Kumagai , Jian Wang
It is well known that Nash-type inequalities for symmetric Dirichlet forms are equivalent to on-diagonal heat kernel upper bounds for the associated symmetric Markov semigroups. In this paper, we show that both imply (and hence are equivalent to) off-diagonal heat kernel upper bounds under some mild assumptions. Our approach is based on a new generalized Davies' method. Our results extend that of [CKS] for Nash-type inequalities with power order considerably and also extend that of [G1] for second order differential operators on a complete non-compact manifold.
中文翻译:
对称马尔可夫半群的热核上限
众所周知,对称Dirichlet形式的Nash型不等式等于相关对称Markov半群的对角热核上限。在本文中,我们表明在某些温和的假设下,这两者都隐含(并因此等价于)非对角热核上限。我们的方法基于一种新的广义Davies方法。我们的结果极大地扩展了具有幂阶的Nash型不等式的[CKS]的结果,并且还扩展了完整非紧凑流形上二阶微分算子的[G1]的结果。