Compact embeddings of Brezis-Wainger type

Let Ω be a bounded domain in Rn and denote by idΩ the restriction operator from the Besov space B1+n/p pq (Rn) into the generalized Lipschitz space Lip(1,−α)(Ω). We study the sequence of entropy numbers of this operator and prove that, up to logarithmic factors, it behaves asymptotically like ek(idΩ...

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Detalhes bibliográficos
Autores: Cobos Díaz, Fernando, Kühn, Thomas, Schonbek, Tomas
Formato: artículo
Fecha de publicación:2006
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/49883
Acesso em linha:https://hdl.handle.net/20.500.14352/49883
Access Level:acceso abierto
Palavra-chave:517.98
Entropy Numbers
Banach-Spaces
Operators
Compact embeddings
Besov spaces
Lipschitz spaces
Mathematics
Análisis matemático
1202 Análisis y Análisis Funcional
Descrição
Resumo:Let Ω be a bounded domain in Rn and denote by idΩ the restriction operator from the Besov space B1+n/p pq (Rn) into the generalized Lipschitz space Lip(1,−α)(Ω). We study the sequence of entropy numbers of this operator and prove that, up to logarithmic factors, it behaves asymptotically like ek(idΩ) ∼ k−1/p if α > max (1 + 2/p −1/q, 1/p). Our estimates improve previous results by Edmunds and Haroske.