Conference paper
Single and dual wavelength exposure of photoresist
J. LaRue, C. Ting
Proceedings of SPIE 1989
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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