Comparison of exit time moment spectra for extrinsic metric balls

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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We prove explicit upper and lower bounds for the $L^1$-moment spectra for the Brownian motion exit time from extrinsic metric balls of submanifolds $P^m$ in ambient Riemannian spaces $N^n$. We assume that $P$ and $N$ both have controlled radial curvatures (mean curvature and sectional curvature, respectively) as viewed from a pole in $N$. The bounds for the exit moment spectra are given in terms of the corresponding spectra for geodesic metric balls in suitably warped product model spaces. The bounds are sharp in the sense that equalities are obtained in characteristic cases. As a corollary we also obtain new intrinsic comparison results for the exit time spectra for metric balls in the ambient manifolds $N^n$ themselves.
Original languageEnglish
JournalPotential Analysis
Publication date2012
Volume36
Issue1
Pages137-153
ISSN0926-2601
DOIs
StatePublished

Bibliographical note

Mat-Report No. 2010-01

CitationsWeb of Science® Times Cited: 0

Keywords

  • Exit moment spectrum, Torsional rigidity, Riemannian submanifolds
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