Harnack's estimates: positivity and local behavior of degenerate and singular parabolic equations.
Hölder estimates for nonlinear degenerate parabolic sytems.
Continuity for bounded solutions of multiphase Stefan problem
We establish the continuity of bounded local solutions of the equation . Here is any coercive maximal monotone graph in , bounded for bounded values of its argument. The multiphase Stefan problem and the Buckley-Leverett model of two immiscible fluids in a porous medium give rise to such singular equations.
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