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On Kadison's condition for extreme points of the unit ball in a B*-algebra
Published online by Cambridge University Press: 20 January 2009
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Let B be a complex Banach algebra with an identity 1 and an involution x→x*. Kadison (1) has shown that, if B is a B*-algebra, [the set of extreme points of its unit ball coincides with the set of elements x of B for which
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