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Cited by 383

The DOI matches its Crossref record; 17 of the 17 references it cites were found in a registry or an index.

The Diffusion Limit of Transport Equations Derived from Velocity-Jump Processes

Othmer, Hans G., Hillen, Thomas·2000·SIAM Journal on Applied Mathematics

Abstract

In this paper we study the diffusion approximation to a transport equation that describes the motion of individuals whose velocity changes are governed by a Poisson process. We show that under an appropriate scaling of space and time the asymptotic behavior of solutions of such equations can be approximated by the solution of a diffusion equation obtained via a regular perturbation expansion. In general the resulting diffusion tensor is anisotropic, and we give necessary and sufficient conditions under which it is isotropic. We also give a method to construct approximations of arbitrary high order for large times. In a second paper (Part II) we use this approach to systematically derive the limiting equation under a variety of external biases imposed on the motion. Depending on the strength of the bias, it may lead to an anisotropic diffusion equation, to a drift term in the flux, or to both. Our analysis generalizes and simplifies previous derivations that lead to the classical Patlak--Keller--Segel--Alt model for chemotaxis.

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Metadata

Authors
Othmer, H. G., & Hillen, T.
Venue
SIAM Journal on Applied Mathematics
Published
2000-01
Volume
61
Issue
3
Pages
751-775
ISSN
  • 0036-1399 (ISSN-L)
  • 1095-712X
OpenAlex
W1973496993
Cited by
383
References
17
FWCI
8.29
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: The Diffusion Limit of Transport Equations Derived from Velocity-Jump Processes. https://app.cochat.ai/papers/10.1137/s0036139999358167
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Othmer, H. G., & Hillen, T. (2000). The Diffusion Limit of Transport Equations Derived from Velocity-Jump Processes. SIAM Journal on Applied Mathematics. https://doi.org/10.1137/s0036139999358167

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