Fast spatial behavior in higher order in time equations and systems
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/3832
EDITED VERSION: https://link.springer.com/10.1007/s00033-022-01745-5
DOCUMENT TYPE: article
In this work, we consider the spatial decay for high-order parabolic (and combined with a hyperbolic) equation in a semi-infinite cylinder. We prove a Phragmén-Lindelöf alternative function and, by means of some appropriate inequalities, we show that the decay is of the type of the square of the distance to the bounded end face of the cylinder. The thermoelastic case is also considered when the heat conduction is modeled using a high-order parabolic equation. Though the arguments are similar to others usually applied, we obtain new relevant results by selecting appropriate functions never considered before.
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