𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Note on Critical Exponents for a System of Heat Equations Coupled in the Boundary Conditions

✍ Scribed by Shu Wang; Chunhong Xie; Mingxin Wang


Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
137 KB
Volume
218
Category
Article
ISSN
0022-247X

No coin nor oath required. For personal study only.

✦ Synopsis


This note establishes the blow up estimates near the blow up time for a system of heat equations coupled in the boundary conditions. Under certain assumptions, the exact rate of blow up is established. We also prove that the only solution with vanishing initial values when pq G 1 is the trivial one.


📜 SIMILAR VOLUMES


On Critical Exponents for a Semilinear P
✍ Marek Fila; Howard A. Levine 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 242 KB

In this paper, we consider the system q 1 1 0 0 and bounded. We prove that if pq F 1 every nonnegative solution is global. When Ž . Ž . Ž . Ž . pq ) 1 we let ␣ s p q 2 r2 pq y 1 , ␤ s 2 q q 1 r2 pq y 1 . We show that if Ž . Ž . max ␣, ␤ ) Nr2 or max ␣, ␤ s Nr2 and p, q G 1, then all nontrivial nonne

On Critical Exponents for the Heat Equat
✍ Bei Hu; Hong-Ming Yin 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 310 KB

In this paper we consider the heat equation u s ⌬ u in an unbounded domain t N Ž . ⍀;R with a partly Dirichlet condition u x, t s 0 and a partly Neumann condition u s u p on the boundary, where p ) 1 and is the exterior unit normal on the boundary. It is shown that for a sectorial domain in R 2 and

Blow-up analysis for a system of heat eq
✍ Xianfa Song 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 128 KB 👁 1 views

## Abstract In this paper, we study a system of heat equations $u\_t=\Delta u, \, v\_t=\Delta v\,{\rm in}\,\Omega\times(0,T)$ coupled __via__ nonlinear boundary conditions Here __p__, __q__>0. We prove that the solutions always blow up in finite time for non‐trivial and non‐negative initial value

The Blow-Up Rate for a Strongly Coupled
✍ Chunlai Mu; Shaoyong Lai 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 106 KB

The paper deals with the blow-up rate of positive solutions to the system l 11 l 12 l 21 l 22 Ž . u s u q u ¨, ¨s ¨q u ¨with boundary conditions u 1, t s t x x t x x x Ž p 11 p 12 .Ž . Ž . Ž p 21 p 22 .Ž . u ¨1, t and ¨1, t s u ¨1, t . Under some assumptions on the x Ž . Ž . Ž . matrices L s l and

The Blow-up Rate for a System of Heat Eq
✍ Julio D. Rossi 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 222 KB 👁 2 views

Under some natural hypothesis on the matrix P"(p GH ) that guarrantee the blow-up of the solution at time ¹, and some assumptions of the initial data u G , we find that if "" x """1 then u G (x , t)goestoinfinitylike(¹!t) G /2 , where the G (0 are the solutions of (P!Id) ( , )R"(!1, !1)R. As a corol