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An Ingham type proof for a bigrid observability theorem

It is well known that classical semi-discretization of the wave equation do not lead to uniform observability. One remedy is to use a two-grid method; this was at first analysed by Negreanu and Zuazua. We propose here an Ingham type approach to study this problem. The main difficulty is to handle wi...

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Detalles Bibliográficos
Autores principales: Loreti, P, Mehrenberger, M
Lenguaje:fre
Publicado: 2005
Materias:
XX
Acceso en línea:http://cds.cern.ch/record/897524