Initial traces and solvability of Cauchy problem to a semilinear parabolic system
- 22 October 2021
- journal article
- research article
- Published by Mathematical Society of Japan (Project Euclid) in Journal of the Mathematical Society of Japan
- Vol. 73 (4), 1-33
- https://doi.org/10.2969/jmsj/84728472
Abstract
Let $(u, v)$ be a solution to a semilinear parabolic system $$ \mbox{(P)} \qquad \left\{ \begin{array}{ll} \partial_t u = D_1 \Delta u+v^p \quad \mbox{in} \quad \mathbf{R}^N \times (0,T),\\ \partial_t v = D_2 \Delta v+u^q \quad \mbox{in}\quad \mathbf{R}^N \times (0,T),\\ u,v \ge 0 \quad \mbox{in} \quad \mathbf{R}^N \times (0,T),\\ (u(\cdot,0),v(\cdot,0)) = (\mu,\nu) \quad \mbox{in} \quad \mathbf{R}^N, \end{array} \right. $$ where $N \ge 1$, $T > 0$, $D_1 > 0$, $D_2 > 0$, $0 < p \le q$ with $pq > 1$ and $(\mu, \nu)$ is a pair of Radon measures or nonnegative measurable functions in $\mathbf{R}^N$. In this paper we study qualitative properties of the initial trace of the solution $(u, v)$ and obtain necessary conditions on the initial data $(\mu, \nu)$ for the existence of solutions to problem (P).
Keywords
This publication has 26 references indexed in Scilit:
- Single-point blow-up for a semilinear parabolic systemJournal of the European Mathematical Society, 2009
- Admissible Lp norms for local existence and for continuation in semilinear parabolic systems are not the sameProceedings of the Royal Society of Edinburgh: Section A Mathematics, 2001
- Initial trace of positive solutions of some nonlinear parabolic equationsCommunications in Partial Differential Equations, 1999
- On the Existence of Solutions of the Cauchy Problem for a Doubly Nonlinear Parabolic EquationSIAM Journal on Mathematical Analysis, 1996
- On the Cauchy Problem and Initial Traces for the Evolution p-Laplacian Equations with Strongly Nonlinear SourcesJournal of Differential Equations, 1995
- A Fujita-type global existence—global non-existence theorem for a system of reaction diffusion equations with differing diffusivitiesMathematical Methods in the Applied Sciences, 1994
- On the Cauchy Problem and Initial Traces for a Degenerate Parabolic EquationTransactions of the American Mathematical Society, 1989
- The Cauchy problem for 𝑢_{𝑡}=Δ𝑢^{𝑚} when 0<𝑚<1Transactions of the American Mathematical Society, 1985
- The initial trace of a solution of the porous medium equationTransactions of the American Mathematical Society, 1983
- Positive temperatures on an infinite rodTransactions of the American Mathematical Society, 1944