Articulo
Oblique projections and frames
Autor
Antezana, Jorge Abel
Corach, Gustavo
Ruiz, Mariano Andrés
Stojanoff, Demetrio
Institución
Resumen
We characterize those frames on a Hilbert space H which can be represented as the image of an orthonormal basis by an oblique projection defined on an extension K of H. We show that all frames with infinite excess and frame bounds 1 ≤ A ≤ B are of this type. This gives a generalization of a result of Han and Larson which only holds for normalized tight frames. Facultad de Ciencias Exactas