Existence and blow-up for higher-order semilinear parabolic equations: Majorizing order-preserving operators

2002 ◽  
Vol 51 (6) ◽  
pp. 1321-1338 ◽  
Author(s):  
V. A. Galaktionov ◽  
S. I. Pohozaev
Keyword(s):  
Parabolic Equations ◽  
Blow Up ◽  
Higher Order ◽  
Semilinear Parabolic Equations ◽  
Semilinear Parabolic

Self-Similar Blow-Up in Higher-Order Semilinear Parabolic Equations

2004 ◽  
Vol 64 (5) ◽  
pp. 1775-1809 ◽  
Author(s):  
C. J. Budd ◽  
J. F. Williams ◽  
V. A. Galaktionov
Keyword(s):  
Parabolic Equations ◽  
Blow Up ◽  
Higher Order ◽  
Semilinear Parabolic Equations ◽  
Self Similar ◽  
Semilinear Parabolic

Global blow-up of a nonlinear heat equation

1986 ◽  
Vol 104 (1-2) ◽  
pp. 161-167 ◽  
Author(s):  
A. A. Lacey
Keyword(s):  
Heat Equation ◽  
Parabolic Equations ◽  
Finite Time ◽  
Positive Measure ◽  
Blow Up ◽  
Nonlinear Heat Equation ◽  
Semilinear Parabolic Equations ◽  
Semilinear Parabolic

SynopsisSolutions to semilinear parabolic equations of the form ut = Δu + f(u), x in Ω, which blow up at some finite time t* are investigated for “slowly growing” functions f. For nonlinearities such as f(s) = (2 +s)(ln(2 +s))1+b with 0 < b < l,u becomes infinite throughout Ω as t→t* −. It is alsofound that for marginally more quickly growing functions, e.g. f(s) = (2 + s)(ln(2 +s))2, u is unbounded on some subset of Ω which has positive measure, and is unbounded throughout Ω if Ω is a small enough region.

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