Spacetime bounds for the energy-critical nonlinear wave equation in three spatial dimensions

Details Spacetime bounds for the energy-critical nonlinear wave equation in three spatial dimensions Spacetime bounds for the energy-critical nonlinear wave equation in three spatial dimensions

2006-01-09

arxiv.org/abs/math/0601164v6

Dynamics of PDE 3 (2006), 93-110

Mathematics

Analysis of PDEs

18 pages, no figures. Some corrections

Scientific paper

Results of Struwe, Grillakis, Struwe-Shatah, Kapitanski, Bahouri-Shatah, Bahouri-G\'erard and Nakanishi have established global wellposedness, regularity, and scattering in the energy class for the energy-critical nonlinear wave equation $\Box u = u^5$ in $\R^{1+3}$, together with a spacetime bound $$ \| u \|_{L^4_t L^{12}_x(\R^{1+3})} \leq M(E(u))$$ for some finite quantity M(E(u)) depending only on the energy E(u) of u. We reprove this result, and show that this quantity obeys a bound of at most exponential type in the energy, and specifically $M(E) \leq C (1+E)^{C E^{105/2}}$ for some absolute constant C > 0. The argument combines the quantitative local potential energy decay estimates of these previous papers with arguments used by Bourgain and the author for the analogous nonlinear Schr\"odinger equation.

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