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Transactions of the American Mathematical Society

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Stability of parabolic Harnack inequalities

Authors: Martin T. Barlow and Richard F. Bass
Journal: Trans. Amer. Math. Soc. 356 (2004), 1501-1533
MSC (2000): Primary 60J27; Secondary 60J35, 31B05
Published electronically: September 22, 2003
MathSciNet review: 2034316
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Abstract: Let $(G,E)$ be a graph with weights $\{a_{xy}\}$ for which a parabolic Harnack inequality holds with space-time scaling exponent $\beta \ge 2$. Suppose $\{a'_{xy}\}$ is another set of weights that are comparable to $\{a_{xy}\}$. We prove that this parabolic Harnack inequality also holds for $(G,E)$ with the weights $\{a'_{xy}\}$. We also give stable necessary and sufficient conditions for this parabolic Harnack inequality to hold.

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Additional Information

Martin T. Barlow
Affiliation: Department of Mathematics, University of British Columbia, Vancouver, Canada V6T 1Z2

Richard F. Bass
Affiliation: Department of Mathematics, University of Connecticut, Storrs, Connecticut 06269

Keywords: Harnack inequality, random walks on graphs, volume doubling, Green functions, Poincar\'{e} inequality, Sobolev inequality, anomalous diffusion
Received by editor(s): January 24, 2003
Published electronically: September 22, 2003
Additional Notes: The first author’s research was partially supported by an NSERC (Canada) grant, and by CNRS (France)
The second author’s research was partially supported by NSF Grant DMS 9988486
Article copyright: © Copyright 2003 American Mathematical Society