S. Klainerman et Tc. Sideris, ON ALMOST GLOBAL EXISTENCE FOR NONRELATIVISTIC WAVE-EQUATIONS IN 3D, Communications on pure and applied mathematics, 49(3), 1996, pp. 307-322
Almost global solutions are constructed to three-dimensional, quadrati
cally nonlinear wave equations. The proof relies on generalized energy
estimates and a new decay estimate. The method applies to equations t
hat are only classically invariant, such as the nonlinear system of hy
perelasticity. (C) 1996 John Wiley & Sons, Inc.