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Autor Plans, A. |
Documentos disponibles escritos por este autor (2)
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texto impreso
The work under consideration fits into the following general circle of problems: Given a Banach space B which possesses a distinguished basis (ei) i?N and a bounded linear operator A:B?C, to what extent does the sequence (Aei) constitute some so[...]texto impreso
Martín Peinador, Elena ; Indurain, E. ; Plans, A. ; Rodés-Usán, Álvaro | Editorial de la Universidad Complutense | 1988Let A be an operator from a separable Banach space X into another Banach space Y. For every M-basis (an) of X the authors define two numbers: hA = hA,(an) = infn||A|[an,...]||and HA = HA,(an) = supnm(A|[an,...]), where [ ] stands for closed line[...]