Local and global existence for evolutionary \(p\)-Laplacian equation with nonlocal source. (Q669622)

The authors investigate the existence and nonexistence of solutions for the parabolic equation \[ u_t-\Delta_p u=u^\alpha|\nabla u|^{l}\ \Big(\int_{{\mathbb R}^N}K(y)u^{q}(y,t)\,dy\Big)^{(r-1)/q}\quad\text{ in }{\mathbb R}^N\times(0,T) \] subject to initial condition \(u(x,0)=u_0(x)\). The authors derive first some useful a priori estimates which are further used to establish the local and global existence of a solution. Further, nonexistence results are obtained. In particular, a Fujita type critical exponent is deduced.