Ricerc@Sapienza

In this paper we study the regularity, the uniqueness and the asymptotic behavior of the solutions to a class of nonlinear operators in dependence of the summability properties of the datum f and of the initial datum $u_0$. The case of only summable data f and $u_0$ is allowed. We prove that these equations satisfy surprising regularization phenomena. Moreover we prove estimates (depending continuously from the data) that for zero datum f become well known decay (or ultracontractive) estimates.