Conference paper
Distilling common randomness from bipartite quantum states
Igor Devetak, Andreas Winter
ISIT 2003
Paper
Extending semilattices is hard
Abstract
We show that the semilattice extension problem raised by Arbib and Manes in [2] is NP-hard, implying that no simple solution is likely to be forthcoming. © 1983 Birkhäuser Verlag.
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