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Construction and coupling of frames in Hilbert spaces with W … · 2016. 10. 27. · Hilbert space...

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Revista Integración Escuela de Matemáticas Universidad Industrial de Santander Vol. 34, No. 1, 2016, pág. 81–93 Construction and coupling of frames in Hilbert spaces with W-metrics German Escobar a , Kevin Esmeral b , Osmin Ferrer b * a Universidad Surcolombiana, Programa de Matemática Aplicada, Neiva, Colombia. b Universidad de Sucre, Departamento de Matemáticas, Sincelejo, Colombia. Dedicated to the memory of our dear friend Ricardo Cedeño Abstract. A definition of frames unitarily equivalent in Hilbert spaces with W-metric is stated, and a characterization is given in terms of their respec- tive analysis operators. From a Hilbert space with a frame we construct a Hilbert space with W-metric and a frame unitarily equivalent to the given one. Finally, we prove that the coupling of two frames is a frame. Keywords: Krein spaces, W-spaces, W-metrics, construction of frames, cou- pling of frames, similar frames. MSC2010: 42C15, 47B50, 46C20. Construcción y acoplamiento de marcos en espacios de Hilbert con W-métricas Resumen. Se definen marcos unitariamente equivalentes en espacios de Hilbert con W-métricas, y se da una caracterización de ellos comparando sus respectivos operadores de análisis. A partir de un espacio de Hilbert con un marco se construye un espacio de Hilbert con W-métrica y un marco unitariamente equivalente al dado. Finalmente, se muestra que el acoplamiento de dos marcos es un marco. Palabras clave: Espacios de Krein, W-espacios, W-métricas, construcción de marcos, acoplamiento de marcos, marcos similares. 0 E-mail: [email protected] Received: 18 August 2015, Accepted: 08 March 2016. To cite this article: G. Escobar, K. Esmeral, O. Ferrer, Construction and coupling of frames in Hilbert spaces with W-metrics, Rev. Integr. Temas Mat. 34 (2016), No. 1, 81–93. 81 DOI: http://dx.doi.org/10.18273/revint.v34n1-2016005
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Page 1: Construction and coupling of frames in Hilbert spaces with W … · 2016. 10. 27. · Hilbert space with W-metric and a frame unitarily equivalent to the given one. Finally, we prove

∮Revista Integración

Escuela de Matemáticas

Universidad Industrial de Santander

Vol. 34, No. 1, 2016, pág. 81–93

Construction and coupling of frames in

Hilbert spaces with W-metrics

German Escobar a, Kevin Esmeral b, Osmin Ferrer b∗

a Universidad Surcolombiana, Programa de Matemática Aplicada, Neiva, Colombia.

b Universidad de Sucre, Departamento de Matemáticas, Sincelejo, Colombia.

Dedicated to the memory of our dear friend

Ricardo Cedeño

Abstract. A definition of frames unitarily equivalent in Hilbert spaces withW-metric is stated, and a characterization is given in terms of their respec-tive analysis operators. From a Hilbert space with a frame we construct aHilbert space with W-metric and a frame unitarily equivalent to the givenone. Finally, we prove that the coupling of two frames is a frame.Keywords: Krein spaces, W-spaces, W-metrics, construction of frames, cou-pling of frames, similar frames.MSC2010: 42C15, 47B50, 46C20.

Construcción y acoplamiento de marcos en

espacios de Hilbert con W-métricas

Resumen. Se definen marcos unitariamente equivalentes en espacios deHilbert con W-métricas, y se da una caracterización de ellos comparandosus respectivos operadores de análisis. A partir de un espacio de Hilbertcon un marco se construye un espacio de Hilbert con W-métrica y unmarco unitariamente equivalente al dado. Finalmente, se muestra que elacoplamiento de dos marcos es un marco.Palabras clave: Espacios de Krein, W-espacios, W-métricas, construcción demarcos, acoplamiento de marcos, marcos similares.

0∗E-mail: [email protected]

Received: 18 August 2015, Accepted: 08 March 2016.To cite this article: G. Escobar, K. Esmeral, O. Ferrer, Construction and coupling of frames in Hilbertspaces with W-metrics, Rev. Integr. Temas Mat. 34 (2016), No. 1, 81–93.

81

DOI: http://dx.doi.org/10.18273/revint.v34n1-2016005

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