Abstract
We provide new existence results for a nonlinear diffusion equation with a monotonically increasing multivalued time-dependent nonlinearity, under minimal growth and coercivity conditions. The results given in this paper prove that a generalized solution to the nonlinear equation is provided by a solution to an equivalent minimization problem for a convex functional involving the potential of the nonlinearity and its conjugate, in the case when the potential is time and space depending. If the potential is time depending only and it has a symmetry at infinity, the null minimizer in the minimization problem is found to coincide with a weak solution to the nonlinear equation.
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Marinoschi, G. A Duality Approach to Nonlinear Diffusion Equations. Set-Valued Var. Anal 22, 783–807 (2014). https://doi.org/10.1007/s11228-014-0288-1
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DOI: https://doi.org/10.1007/s11228-014-0288-1
Keywords
- Variational methods
- Brezis-Ekeland principle
- Convex optimization problems
- Nonlinear diffusion equations
- Porous media equations