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Logical foundations for hybrid type-logical grammars. (English) Zbl 1515.03115

Summary: This paper explores proof-theoretic aspects of hybrid type-logical grammars, a logic combining Lambek grammars with lambda grammars. We prove some basic properties of the calculus, such as normalisation and the subformula property and also present both a sequent and a proof net calculus for hybrid type-logical grammars. In addition to clarifying the logical foundations of hybrid type-logical grammars, the current study opens the way to variants and extensions of the original system, including but not limited to a non-associative version and a multimodal version incorporating structural rules and unary modes.

MSC:

03B47 Substructural logics (including relevance, entailment, linear logic, Lambek calculus, BCK and BCI logics)
03B40 Combinatory logic and lambda calculus
03F05 Cut-elimination and normal-form theorems
03F07 Structure of proofs
68Q42 Grammars and rewriting systems

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