In this paper we study the global existence and asymptotic behaviour of solutions to u t =2 log u for the Cauchy initial value problem in R n . We prove that if n 3, then every solution satisfies R n u p (x, t) dx= for any 1< p nÂ2, where 0nÂ2. Hence, we extend a previous result of Vazquez [19] whic
Existence of fast positive wavefronts for a non-local delayed reaction–diffusion equation
✍ Scribed by Maitere Aguerrea
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 836 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0362-546X
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✦ Synopsis
We establish the existence of a continuous family of fast positive wavefronts u(t, x) = φ(x+ct), φ(-∞) = 0, φ(+∞) = κ, for the non-local delayed reaction-diffusion equation
Here 0 and κ > 0 are fixed points of g ∈ C 2 (R + , R + ) and the non-negative K is such that R K (w)e λw dw is finite for every real λ. We also prove that the fast wavefronts are non-monotone if g (κ)he h+1 < -1.
📜 SIMILAR VOLUMES
In this paper we investigate the properties of positive solutions for three non-local reaction-diffusion problems. The conditions on the existence and non-existence of global positive solutions are given. Moreover, we prove that the blow-up set is the whole region when the non-linearity occurs in th