Blow up of solutions of semilinear heat equations in non radial domains of \mathbb{R}^2

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March 2015, 35(3): 891-907. doi: 10.3934/dcds.2015.35.891

Blow up of solutions of semilinear heat equations in non radial domains of $\mathbb{R}^2$

Francesca De Marchis ^1, and Isabella Ianni ^2,

1.	Dipartimento di Matematica, Università di Roma Tor Vergata, Via della Ricerca Scientica 1, 00133 Roma, Italy
2.	Dipartimento di Matematica e Fisica, Seconda Università di Napoli, V.le Lincoln 5, 81100 Caserta, Italy

Received February 2014 Revised May 2014 Published October 2014

Abstract
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We consider the semilinear heat equation \begin{equation}\label{problemAbstract}\left\{\begin{array}{ll}v_t-\Delta v= |v|^{p-1}v & \mbox{ in }\Omega\times (0,T)\\ v=0 & \mbox{ on }\partial \Omega\times (0,T)\\ v(0)=v_0 & \mbox{ in }\Omega \end{array}\right.\tag{$\mathcal P_p$} \end{equation} where $p>1$, $\Omega$ is a smooth bounded domain of $\mathbb{R}^2$, $T\in (0,+\infty]$ and $v_0$ belongs to a suitable space. We give general conditions for a family $u_p$ of sign-changing stationary solutions of ($\mathcal P_p$), under which the solution of ($\mathcal P_p$) with initial value $v_0=\lambda u_p$ blows up in finite time if $|\lambda-1|>0$ is sufficiently small and $p$ is sufficiently large. Since for $\lambda=1$ the solution is global, this shows that, in general, the set of the initial conditions for which the solution is global is not star-shaped with respect to the origin. In [5] this phenomenon has been previously observed in the case when the domain is a ball and the sign changing stationary solution is radially symmetric. Our conditions are more general and we provide examples of stationary solutions $u_p$ which are not radial and exhibit the same behavior.

Keywords: sign-changing stationary solutions, Semilinear heat equation, finite-time blow-up, asymptotic behavior..

Mathematics Subject Classification: Primary: 35K91, 35B35, 35B44, 35J9.

Citation: Francesca De Marchis, Isabella Ianni. Blow up of solutions of semilinear heat equations in non radial domains of $\mathbb{R}^2$. Discrete and Continuous Dynamical Systems, 2015, 35 (3) : 891-907. doi: 10.3934/dcds.2015.35.891

References:

[1]	Adimurthi and M. Grossi, Asymptotic estimates for a two dimensional problem with polynomial nonlinearity, Proc. Amer. Math. Soc., 132 (2004), 1013-1019. doi: 10.1090/S0002-9939-03-07301-5.
[2]	T. Cazenave, F. Dickstein and F. B. Weissler, Sign-changing stationary solutions and blow up for the nonlinear heat equation in a ball, Math Ann., 344 (2009), 431-449. doi: 10.1007/s00208-008-0312-6.
[3]	F. De Marchis, I. Ianni and F. Pacella, Sign changing solutions of Lane Emden problems with interior nodal line and semilinear heat equations, Journal of Differential Equations, 254 (2013), 3596-3614. doi: 10.1016/j.jde.2013.01.037.
[4]	F. De Marchis, I. Ianni and F. Pacella, Asymptotic analysis and sign changing bubble towers for Lane-Emden problems,, accepted for publication in Journal of the European Mathematical Society, ().
[5]	F. Dickstein, F. Pacella and B. Sciunzi, Sign-changing stationary solutions and blow up for the nonlinear heat equation in dimension two, Journal of Evolution Equation, 14 (2014), 617-633. doi: 10.1007/s00028-014-0230-x.
[6]	P. Esposito, M. Musso and A. Pistoia, On the existence and profile of nodal solutions for a two-dimensional elliptic problem with large exponent in nonlinearity, Proc. Lond. Math. Soc., 94 (2007), 497-519. doi: 10.1112/plms/pdl020.
[7]	M. Grossi, C. Grumiau and F. Pacella, Lane Emden problems: Asymptotic behavior of low energy nodal solutions, Ann. Inst. H. Poincare Anal. Non Lineaire, 30 (2013), 121-140. doi: 10.1016/j.anihpc.2012.06.005.
[8]	M. Grossi, C. Grumiau and F. Pacella, Lane Emden problems with large exponents and singular Liouville equations, Journal Math. Pure and Appl., 101 (2014), 735-754. doi: 10.1016/j.matpur.2013.06.011.
[9]	V. Marino, F. Pacella and B. Sciunzi, Blow-up of solutions of semilinear heat equations in general domains, Comm. Cont. Math., 14 (2014), 617-633. doi: 10.1142/S0219199713500429.
[10]	P. Quittner and P. Souplet, Superlinear Parabolic Problems, Birkhäuser Basel-Boston-Berlin, 2007.
[11]	X. Ren and J. Wei, Single-point condensation and least-energy solutions, Proc. Amer. Math. Soc., 124 (1996), 111-120. doi: 10.1090/S0002-9939-96-03156-5.

show all references

References:

[1]	Adimurthi and M. Grossi, Asymptotic estimates for a two dimensional problem with polynomial nonlinearity, Proc. Amer. Math. Soc., 132 (2004), 1013-1019. doi: 10.1090/S0002-9939-03-07301-5.
[2]	T. Cazenave, F. Dickstein and F. B. Weissler, Sign-changing stationary solutions and blow up for the nonlinear heat equation in a ball, Math Ann., 344 (2009), 431-449. doi: 10.1007/s00208-008-0312-6.
[3]	F. De Marchis, I. Ianni and F. Pacella, Sign changing solutions of Lane Emden problems with interior nodal line and semilinear heat equations, Journal of Differential Equations, 254 (2013), 3596-3614. doi: 10.1016/j.jde.2013.01.037.
[4]	F. De Marchis, I. Ianni and F. Pacella, Asymptotic analysis and sign changing bubble towers for Lane-Emden problems,, accepted for publication in Journal of the European Mathematical Society, ().
[5]	F. Dickstein, F. Pacella and B. Sciunzi, Sign-changing stationary solutions and blow up for the nonlinear heat equation in dimension two, Journal of Evolution Equation, 14 (2014), 617-633. doi: 10.1007/s00028-014-0230-x.
[6]	P. Esposito, M. Musso and A. Pistoia, On the existence and profile of nodal solutions for a two-dimensional elliptic problem with large exponent in nonlinearity, Proc. Lond. Math. Soc., 94 (2007), 497-519. doi: 10.1112/plms/pdl020.
[7]	M. Grossi, C. Grumiau and F. Pacella, Lane Emden problems: Asymptotic behavior of low energy nodal solutions, Ann. Inst. H. Poincare Anal. Non Lineaire, 30 (2013), 121-140. doi: 10.1016/j.anihpc.2012.06.005.
[8]	M. Grossi, C. Grumiau and F. Pacella, Lane Emden problems with large exponents and singular Liouville equations, Journal Math. Pure and Appl., 101 (2014), 735-754. doi: 10.1016/j.matpur.2013.06.011.
[9]	V. Marino, F. Pacella and B. Sciunzi, Blow-up of solutions of semilinear heat equations in general domains, Comm. Cont. Math., 14 (2014), 617-633. doi: 10.1142/S0219199713500429.
[10]	P. Quittner and P. Souplet, Superlinear Parabolic Problems, Birkhäuser Basel-Boston-Berlin, 2007.
[11]	X. Ren and J. Wei, Single-point condensation and least-energy solutions, Proc. Amer. Math. Soc., 124 (1996), 111-120. doi: 10.1090/S0002-9939-96-03156-5.

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