Geodesic
A purely analytic criterion for a decomposable operator
Glasgow mathematical journal, Tome 21 (1980) no. 1, pp. 69-70

Voir la notice de l'article provenant de la source Cambridge University Press

In [3] E. Bishop introduced the notion of an operator with a “duality theory of type 3” and gave a certain sufficient condition for an operator to have a duality theory of type 3. In this note we show that in fact Bishop's sufficient condition implies that a given operator is decomposable [4]. Moreover, this condition characterizes a decomposable operator. 
Lange, Ridgley. A purely analytic criterion for a decomposable operator. Glasgow mathematical journal, Tome 21 (1980) no. 1, pp. 69-70. doi: 10.1017/S0017089500003992
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