Conference paper
Surface light-induced changes in thin polymer films
Andrew Skumanich
SPIE Optics Quebec 1993
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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