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226. CMB 1997 (vol 40 pp. 254)

Saito, Kichi-Suke; Watatani, Yasuo
Subdiagonal algebras for subfactors II (finite dimensional case)
We show that finite dimensional subfactors do not have subdiagonal algebras unless the Jones index is one.

Categories:46K50, 46L37

227. CMB 1997 (vol 40 pp. 10)

Borwein, Jon; Vanderwerff, Jon
Convex functions on Banach spaces not containing $\ell_1$
There is a sizeable class of results precisely relating boundedness, convergence and differentiability properties of continuous convex functions on Banach spaces to whether or not the space contains an isomorphic copy of $\ell_1$. In this note, we provide constructions showing that the main such results do not extend to natural broader classes of functions.

Categories:46A55, 46B20, 52A41
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