Remarks on global solutions to the initial-boundary value problem for quasilinear degenerate parabolic equations with a nonlinear source term

We give an existence theorem of global solution to the initial-boundary value problem for [formula] under some smallness conditions on the initial data, where [formula] is a positive function of [formula] admitting the degeneracy property δ (0) = 0. We are interested in the case where [formula] has no exponent m ≥ 0 such that [formula]. A typical example is [formula]. ƒ (u) is a function like [formula] A decay estimate for [formula] is also given