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Hölder estimates of solutions to a degenerate diffusion equation
Authors:Yunguang Lu
Institution:Departamento de Matemáticas y Estadística, Universidad Nacional de Colombia, Bogotá, Colombia -- and -- Department of Mathematics, University of Science & Technology of China, Hefei, People's Republic of China
Abstract:This paper is concerned with the Hölder estimates of weak solutions of the Cauchy problem for the general degenerate parabolic equations

\begin{displaymath}u_{t}= \Delta G(u)+ \sum \limits _{j=1}^{N}f_{j}(u)_{x_{j}}+h(u), \end{displaymath}

with the initial data $u(x,0)=u_{0}(x_1,x_2,\dots,x_N)$, where the diffusion function $G(u)$ can be a constant on a nonzero measure set, such as the equations of two-phase Stefan type. Some explicit Hölder exponents of the composition function $G(u)$ with respect to the space variables are obtained by using the maximum principle.

Keywords:Degenerate parabolic equation  H\"older solution  maximum principle
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