Conference paper
Distilling common randomness from bipartite quantum states
Igor Devetak, Andreas Winter
ISIT 2003
A theorem of Korovkin states that a sequence of positive linear operators on C[a, 6] converges strongly to the identity if and only if convergence holds on a three-dimensional Chebyshev subspace of C[a, b]. We extend this theorem to include Chebyshev subspaces of arbitrary dimension and convergence to other positive linear operators. © 1973, American Mathematical Society.
Igor Devetak, Andreas Winter
ISIT 2003
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