Codice  QDD 126 
Titolo  On the moments of solutions to linear parabolic equations involving the biharmonic operator 
Data  20120711 
Autore/i  Gazzola, F. 
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Abstract  We consider the solutions to Cauchy problems for the parabolic equation $u_ tau + Delta^2u=0$ in $ mathbb{R}_+ times mathbb{R}^n$, with fast decay initial data. We study the behavior of their moments. This enables us to give a more precise description of the signchanging behavior of solutions corresponding to positive initial data. 
