Conference paper
Wavefront and caustic surfaces of refractive laser beam shaper
David L. Shealy, John A. Hoffnagle
SPIE Optical Engineering + Applications 2007
Paper
Characterizing derivation trees of context-free grammars through a generalization of finite automata theory
Abstract
The recognizable sets of value trees (pseudoterms) are shown to be exactly projections of sets of derivation trees of (extended) context-free grammars. © 1968 Academic Press Inc.
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