Bibliography

A normal form theorem for label grammars

Matthias Jantzen and Manfred Opp.
A normal form theorem for label grammars.
Mathematical Systems Theory, 14(1):289-303, 1981.

BibTeX

@article{Jantzen+81,
 Abstract = {We characterize the images of Szilard languages under
decreasing homomorphisms using so-called label grammars and show that each $\lambda$-free
label language is in fact the coding of some Szilard language. This result shows that
decreasing homomorphisms do not have more generating power on Szilard languages than
codings, except that they generate the empty word.},
 Author = {Jantzen, Matthias and Opp, Manfred},
 Journal = {Mathematical Systems Theory},
 Number = 1,
 Pages = {289--303},
 Title = {A normal form theorem for label grammars},
 Volume = 14,
 Year = 1981
}