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On the Form of Smooth-Front Travelling Waves in a Reaction-Diffusion Equation with Degenerate Nonlinear Diffusion

J.A. Sherratt (2010)

Mathematical Modelling of Natural Phenomena

Reaction-diffusion equations with degenerate nonlinear diffusion are in widespread use as models of biological phenomena. This paper begins with a survey of applications to ecology, cell biology and bacterial colony patterns. The author then reviews mathematical results on the existence of travelling wave front solutions of these equations, and their generation from given initial data. A detailed study is then presented of the form of smooth-front...

On the fractional differentiability of the spatial derivatives of weak solutions to nonlinear parabolic systems of higher order

Roberto Amato (2016)

Czechoslovak Mathematical Journal

We are concerned with the problem of differentiability of the derivatives of order m + 1 of solutions to the “nonlinear basic systems” of the type ( - 1 ) m | α | = m D α A α ( D ( m ) u ) + u t = 0 in Q . We are able to show that D α u L 2 ( - a , 0 , H ϑ ( B ( σ ) , N ) ) , | α | = m + 1 , for ϑ ( 0 , 1 / 2 ) and this result suggests that more regularity is not expectable.

On the heat kernel and the Korteweg--de Vries hierarchy

Plamen Iliev (2005)

Annales de l’institut Fourier

We give explicit formulas for Hadamard's coefficients in terms of the tau-function of the Korteweg-de Vries hierarchy. We show that some of the basic properties of these coefficients can be easily derived from these formulas.

On the Hölder continuity of weak solutions to nonlinear parabolic systems in two space dimensions

Joachim Naumann, Jörg Wolf, Michael Wolff (1998)

Commentationes Mathematicae Universitatis Carolinae

We prove the interior Hölder continuity of weak solutions to parabolic systems u j t - D α a j α ( x , t , u , u ) = 0 in Q ( j = 1 , ... , N ) ( Q = Ω × ( 0 , T ) , Ω 2 ), where the coefficients a j α ( x , t , u , ξ ) are measurable in x , Hölder continuous in t and Lipschitz continuous in u and ξ .

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