eprintid: 10141795 rev_number: 15 eprint_status: archive userid: 608 dir: disk0/10/14/17/95 datestamp: 2022-01-13 10:42:07 lastmod: 2022-04-07 06:10:27 status_changed: 2022-01-13 10:42:07 type: proceedings_section metadata_visibility: show creators_name: Marin, S creators_name: Pereira, LC creators_name: Pimentel, E creators_name: Sales, E title: A Pure View of Ecumenical Modalities ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F48 note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Recent works about ecumenical systems, where connectives from classical and intuitionistic logics can co-exist in peace, warmed the discussion on proof systems for combining logics. This discussion has been extended to alethic modalities using Simpson’s meta-logical characterization: necessity is independent of the viewer, while possibility can be either intuitionistic or classical. In this work, we propose a pure, label free calculus for ecumenical modalities, nEK, where exactly one logical operator figures in introduction rules and every basic object of the calculus can be read as a formula in the language of the ecumenical modal logic EK. We prove that nEK is sound and complete w.r.t. the ecumenical birelational semantics and discuss fragments and extensions. date: 2021-10-06 date_type: published publisher: Springer official_url: https://doi.org/10.1007/978-3-030-88853-4_24 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1912797 doi: 10.1007/978-3-030-88853-4_24 isbn_13: 978-3-030-88852-7 lyricists_name: Pimentel, Elaine lyricists_id: EPIME68 actors_name: Pimentel, Elaine actors_id: EPIME68 actors_role: owner full_text_status: public series: Lecture Notes in Computer Science publication: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) volume: 13038 place_of_pub: Cham, Switzerland pagerange: 388-407 event_title: WoLLIC 2021: Logic, Language, Information, and Computation issn: 1611-3349 book_title: Logic, Language, Information, and Computation. WoLLIC 2021. Lecture Notes in Computer Science citation: Marin, S; Pereira, LC; Pimentel, E; Sales, E; (2021) A Pure View of Ecumenical Modalities. In: Logic, Language, Information, and Computation. WoLLIC 2021. Lecture Notes in Computer Science. (pp. pp. 388-407). Springer: Cham, Switzerland. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10141795/1/Paper43-WoLLIC21.pdf