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Asymptotic solutions of a nonlinear diffusive equation in the framework of $κ$-generalized statistical mechanics

The asymptotic behavior of a nonlinear diffusive equation obtained in the framework of the $κ$-generalized statistical mechanics is studied. The analysis based on the classical Lie symmetry shows that the $κ$-Gaussian function is not a scale invariant solution of the generalized diffusive equation. Notwithstanding, several numerical simulations, with different initial conditions, show that the solutions asymptotically approach to the $κ$-Gaussian function. Simple argument based on a time-dependent transformation performed on the related $κ$-generalized Fokker-Planck equation, supports this conclusion.