Breakdown of solutions to $\square u+u_t=|u|^{1+\alpha}$

Abstract

In the paper we give an upper bound for the life-span of the mild solution to the Cauchy problem for semilinear equations $\square u+u_t=|u|^{1+\alpha}$ ($\alpha >0,$ constant) with certain small initial data. This shows the sharpness of the lower bound obtained in [2] on the life-span of classical solutions to the Cauchy problem for fully nonlinear wave equations with linear dissipation with small initial data.

Locations

• Discrete and Continuous Dynamical Systems - View - PDF