Title
Syntactic Interpolation for Tense Logics and Bi-Intuitionistic Logic via Nested Sequents.
Abstract
We provide a direct method for proving Craig interpolation for a range of modal and intuitionistic logics, including those containing a "converse" modality. We demonstrate this method for classical tense logic, its extensions with path axioms, and for bi-intuitionistic logic. These logics do not have straightforward formalisations in the traditional Gentzen-style sequent calculus, but have all been shown to have cut-free nested sequent calculi. The proof of the interpolation theorem uses these calculi and is purely syntactic, without resorting to embeddings, semantic arguments, or interpreted connectives external to the underlying logical language. A novel feature of our proof includes an orthogonality condition for defining duality between interpolants.
Year
DOI
Venue
2020
10.4230/LIPIcs.CSL.2020.28
CSL
Field
DocType
Citations 
Intuitionistic logic,Discrete mathematics,Algebra,Computer science,Interpolation,Proof theory,Syntax
Conference
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Tim Lyon100.34
Alwen Tiu202.03
Rajeev Gore3564.06
Ranald Clouston400.34