RT Book, Section T1 On some operator ideals defined by approximation numbers A1 Cobos Díaz, Fernando A1 Resina, Ivam A2 Martín Peinador, Elena A2 Rodés, A. AB The authors prove a representation theorem in terms of finite rank operators for operators´T on Banach spaces which satisfy sup n2N (log n) an(T) < 1, 0 < < 1.Here an(T) denote the approximation numbers. The theorem is in formal analogy to the Lp-type theorem for approximation number ideals. PB Cambridge University Press SN 9780521367523 YR 1989 FD 1989 LK https://hdl.handle.net/20.500.14352/60759 UL https://hdl.handle.net/20.500.14352/60759 NO Ministerio de Educación, Formación Profesional y Deportes (España) - Programa de Cooperación con Iberoamérica NO FAPESP-BRASIL DS Docta Complutense RD 6 jul 2025