Abstract
We provide some additional completeness results for the full Lambek calculus and syntactic concept lattices, where the underlying structure is extended to tuples of arbitrary finite and infinite size. Whereas this answers an open question for finite tuples, infinite tuples have not been considered yet. Nonetheless, they have a number of interesting properties which we establish in this paper, such as a particular class of languages which results in a finite lattice.
Notes
- 1.
Or words, respectively, depending on whether we think of our language as a set of words or a set of strings of words; we will choose the former option.
- 2.
Whereas L and L1 are equally powerful in the sense of languages which are recognizable, [11] shows that \(\mathbf{FL }\) is considerably more powerful than L: whereas L only recognizes context-free languages by the classical result of [17], \(\mathbf{FL }\) can recognize any finite intersection of context-free languages. We only briefly mention this, because we have no space to make precise what it means for a calculus to recognize a class of languages.
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Wurm, C. (2016). On Some Extensions of Syntactic Concept Lattices: Completeness and Finiteness Results. In: Foret, A., Morrill, G., Muskens, R., Osswald, R., Pogodalla, S. (eds) Formal Grammar. FG FG 2015 2016. Lecture Notes in Computer Science(), vol 9804. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-53042-9_10
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