V. Georgiev et G. Todorova, EXISTENCE OF A SOLUTION OF THE WAVE-EQUATION WITH NONLINEAR DAMPING AND SOURCE TERMS, Journal of differential equations, 109(2), 1994, pp. 295-308
We study the nonlinear wave equation involving the nonlinear damping t
erm u(t)\u(t)\m-1 and a source term of type u\u\p-1. For 1 < p less-th
an-or-equal-to m we prove a global existence theorem with large initia
l data. For 1 < m < p a blow-up result is established for sufficiently
large initial data. (C) 1994 Academic Press, Inc.