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Finite speed of propagation for the thin-film equation and other higher-order parabolic equations with general nonlinearity

Finite speed of propagation for the thin-film equation and other higher-order parabolic equations with general nonlinearity

We prove the property of finite speed of propagation for degenerate parabolic equations of order 2m \[ges] 2, when the nonlinearity is of general type, and not necessarily a power function. We also give estimates of the growth in time of the interface bounding the support of the solution. In …