d e no te b y B (r e sp. B*) t h e unit ba ll of X (r e sp. X *). Let a lso
b u t y*/G (T +S)(x). C laimI. x G DT?D?( t o be prov e d l ate r).i. Thus T(x) +S(x) /= 0 a nd, a s no t ic e d ab ov e , T(x) +S(x) isw*-clos e d a nd conv ... 
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