The search session has expired. Please query the service again.

The search session has expired. Please query the service again.

The search session has expired. Please query the service again.

The search session has expired. Please query the service again.

Displaying similar documents to “Construction of an orthonormal basis in C m ( I d ) and W p m ( I d )

Uniqueness of unconditional bases in c 0 -products

P. Casazza, N. Kalton (1999)

Studia Mathematica

Similarity:

We give counterexamples to a conjecture of Bourgain, Casazza, Lindenstrauss and Tzafriri that if X has a unique unconditional basis (up to permutation) then so does c 0 ( X ) . We also give some positive results including a simpler proof that c 0 ( 1 ) has a unique unconditional basis and a proof that c 0 ( p n N n ) has a unique unconditional basis when p n 1 , N n + 1 2 N n and ( p n - p n + 1 ) l o g N n remains bounded.

Uniqueness of unconditional bases of c 0 ( l p ) , 0 < p < 1

C. Leránoz (1992)

Studia Mathematica

Similarity:

We prove that if 0 < p < 1 then a normalized unconditional basis of a complemented subspace of c 0 ( l p ) must be equivalent to a permutation of a subset of the canonical unit vector basis of c 0 ( l p ) . In particular, c 0 ( l p ) has unique unconditional basis up to permutation. Bourgain, Casazza, Lindenstrauss, and Tzafriri have previously proved the same result for c 0 ( l ) .