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Every separable Banach space has a bounded strong norming biorthogonal sequence which is also a Steinitz basis

Paolo Terenzi (1994)

Studia Mathematica

Every separable, infinite-dimensional Banach space X has a biorthogonal sequence z n , z * n , with s p a n z * n norming on X and z n + z * n bounded, so that, for every x in X and x* in X*, there exists a permutation π(n) of n so that x c o n v ¯ f i n i t e s u b s e r i e s o f n = 1 z * n ( x ) z n a n d x * n ( x ) = n = 1 z * π ( n ) ( x ) x * ( z π ( n ) ) .

Every separable L₁-predual is complemented in a C*-algebra

Wolfgang Lusky (2004)

Studia Mathematica

We show that every separable complex L₁-predual space X is contractively complemented in the CAR-algebra. As an application we deduce that the open unit ball of X is a bounded homogeneous symmetric domain.

Examples of k-iterated spreading models

Spiros A. Argyros, Pavlos Motakis (2013)

Studia Mathematica

It is shown that for every k ∈ ℕ and every spreading sequence eₙₙ that generates a uniformly convex Banach space E, there exists a uniformly convex Banach space X k + 1 admitting eₙₙ as a k+1-iterated spreading model, but not as a k-iterated one.

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