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Smoothing and Decay Estimates for Nonlinear Diffusion EquationsEquations of Porous Medium Type$
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Juan Luis Vázquez

Print publication date: 2006

Print ISBN-13: 9780199202973

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780199202973.001.0001

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Logarithmic diffusion in 2D and intermediate 1D range

Logarithmic diffusion in 2D and intermediate 1D range

Chapter:
(p.140) 8 Logarithmic diffusion in 2D and intermediate 1D range
Source:
Smoothing and Decay Estimates for Nonlinear Diffusion Equations
Author(s):

Juan Luis Vázquez

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199202973.003.0009

This chapter studies two transition situations where non-uniqueness plays an important role. The first deals with the range -1 < m ≤ 0 in n = 1, which looks like supercritical but contains the non-uniqueness phenomenon for the Cauchy problem. The second is the study of logarithmic diffusion in the plane, i.e., the case m = 0 for n = 2 which has many appealing features for the analyst and the geometer.

Keywords:   intermediate range, logarithmic diffusion, weak smoothing effect, asymptotic behaviour, weak local effect

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