Díaz Díaz, Jesús IldefonsoVrabie, Ioan I.2023-06-202023-06-201989-06-290764-4442https://hdl.handle.net/20.500.14352/57515We show some compactness properties of the operator f--u, where u is the solution of the nonlinear diffusion equation ut−Δφ(u)=f on (0,T)×Ω associated with the parabolic boundary conditions φ(u)=0 on (0,T)×∂Ω and u(0,⋅)=u0(⋅) on Ω, u0 a given function in L1(Ω). Our results are carried out under the general assumption that φ is a real continuous strictly increasing function satisfying φ(0)=0.journal articlehttp://www.sciencedirect.com/science/journal/07644442http://www.sciencedirect.com/metadata only access517.956.4compactness propertiesGreen operatorporous media equationGeometría diferencial1204.04 Geometría Diferencial