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Article history: Received 10 July 2009 Received in revised form 27 August 2009 Accepted 1 September 2009 Available online 5 September 2009 Communicated by P.R. Holland PACS: 03.65.Nk 03.65.Xp

Aplicaciones de las extensiones autoadjuntas de operadores simétricos a sistemas físicos con masa variable y potenciales singulares