Claudio Giorgi

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This work is focused on the dissipative system ∂ tt u + ∂ xxxx u + ∂ xx θ − β + ∂ x u 2 L 2 (0,1) ∂ xx u = f ∂ t θ − ∂ xx θ − ∂ xxt u = g describing the dynamics of an extensible thermoelastic beam, where the dissipation is entirely contributed by the second equation ruling the evolution of θ. Under natural boundary conditions, we prove the existence of(More)
In this paper we study the gauge-invariance of the time-dependent Ginzburg Landau equations through the introduction of a model which uses observable variables. Since different choices of gauge lead to a different representation of such variables, the classical formulations of the Ginzburg Landau model do not allow to establish the property of(More)
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