Off-Diagonal Heat Kernel Asymptotics of Pseudodifferential Operators on Closed Manifolds and Subordinate Brownian Motion

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Abstract

We derive the off-diagonal short-time asymptotics of the heat kernels of functions of generalised Laplacians on a closed manifold. As an intermediate step we give an explicit asymptotic series for the kernels of the complex powers of generalised Laplacians. Each asymptotic series is formulated in terms of the geodesic distance. The key application concerns upper bounds for the transition density of subordinate Brownian motion. The approach is highly explicit and tractable.
Original languageEnglish
Number of pages21
JournalIntegral Equations and Operator Theory
Early online date4 Feb 2017
DOIs
StateE-pub ahead of print - 4 Feb 2017

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Asymptotic series
Heat kernel
Brownian motion
Closed
Brownian movement
Geodesic distance
Transition density
Pseudodifferential operators
kernel
Upper bound

Cite this

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title = "Off-Diagonal Heat Kernel Asymptotics of Pseudodifferential Operators on Closed Manifolds and Subordinate Brownian Motion",
abstract = "We derive the off-diagonal short-time asymptotics of the heat kernels of functions of generalised Laplacians on a closed manifold. As an intermediate step we give an explicit asymptotic series for the kernels of the complex powers of generalised Laplacians. Each asymptotic series is formulated in terms of the geodesic distance. The key application concerns upper bounds for the transition density of subordinate Brownian motion. The approach is highly explicit and tractable.",
author = "Fahrenwaldt, {Matthias Albrecht}",
year = "2017",
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doi = "10.1007/s00020-017-2344-3",
journal = "Integral Equations and Operator Theory",
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AB - We derive the off-diagonal short-time asymptotics of the heat kernels of functions of generalised Laplacians on a closed manifold. As an intermediate step we give an explicit asymptotic series for the kernels of the complex powers of generalised Laplacians. Each asymptotic series is formulated in terms of the geodesic distance. The key application concerns upper bounds for the transition density of subordinate Brownian motion. The approach is highly explicit and tractable.

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