INVESTIGADORES
TOLOZA Julio Hugo
capítulos de libros
Título:
The spectra of selfadjoint extensions of entire operators with deficiency indices (1,1)
Autor/es:
LUIS O. SILVA; JULIO H. TOLOZA
Libro:
Operator Methods in Mathematical Physics (Operator Theory: Advances and Applications)
Editorial:
Springer Basel AG
Referencias:
Lugar: Basilea; Año: 2013; p. 151 - 164
Resumen:
We give necessary and sufficient conditions for real sequences to be the spectra of selfadjoint extensions of an entire operator whose domain may be non-dense. For this spectral characterization we use de Branges space techniques and a generalization of Krein´s functional model for simple, regular, closed, symmetric operators with deficiency indices (1,1). This is an extension of our previous work in which similar results were obtained for densely defined operators.