Abstract:
Decidability of the validity problem is established for a family of many-valued modal logics, notably Gödel modal logics, where propositional connectives are evaluated according to the order of values in a complete sublattice of the real unit interval [0,1], and box and diamond modalities are evaluated as infima and suprema over (many-valued) Kripke frames. If the sublattice is infinite and the language is sufficiently expressive, then the standard semantics for such a logic lacks the finite model property. It is shown here, however, that, given certain regularity conditions, the finite model property holds for a new semantics for the logic, providing a basis for establishing decidability and PSPACE-completeness. Similar results are also established for S5 logics that coincide with one-variable fragments of first-order many-valued logics. In particular, a first proof is given of the decidability and co-NP-completeness of validity in the one-variable fragment of first-order Gödel logic. © 2017 Elsevier Inc.
Registro:
Documento: |
Artículo
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Título: | Decidability of order-based modal logics |
Autor: | Caicedo, X.; Metcalfe, G.; Rodríguez, R.; Rogger, J. |
Filiación: | Departamento de Matemáticas, Universidad de los Andes, Bogotá, Colombia Mathematical Institute, University of Bern, Switzerland Departamento de Computación, Universidad de Buenos Aires, Argentina
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Palabras clave: | Complexity; Decidability; Finite model property; Gödel logics; Many-valued logics; Modal logics; One-variable fragments; Computability and decidability; Computer circuits; Formal logic; Semantics; Complexity; Finite model property; Modal logic; Np-completeness; Pspace completeness; Regularity condition; Unit intervals; Variable fragment; Many valued logics |
Año: | 2017
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Volumen: | 88
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Página de inicio: | 53
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Página de fin: | 74
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DOI: |
http://dx.doi.org/10.1016/j.jcss.2017.03.012 |
Título revista: | Journal of Computer and System Sciences
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Título revista abreviado: | J. Comput. Syst. Sci.
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ISSN: | 00220000
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CODEN: | JCSSB
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220000_v88_n_p53_Caicedo |
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Citas:
---------- APA ----------
Caicedo, X., Metcalfe, G., Rodríguez, R. & Rogger, J.
(2017)
. Decidability of order-based modal logics. Journal of Computer and System Sciences, 88, 53-74.
http://dx.doi.org/10.1016/j.jcss.2017.03.012---------- CHICAGO ----------
Caicedo, X., Metcalfe, G., Rodríguez, R., Rogger, J.
"Decidability of order-based modal logics"
. Journal of Computer and System Sciences 88
(2017) : 53-74.
http://dx.doi.org/10.1016/j.jcss.2017.03.012---------- MLA ----------
Caicedo, X., Metcalfe, G., Rodríguez, R., Rogger, J.
"Decidability of order-based modal logics"
. Journal of Computer and System Sciences, vol. 88, 2017, pp. 53-74.
http://dx.doi.org/10.1016/j.jcss.2017.03.012---------- VANCOUVER ----------
Caicedo, X., Metcalfe, G., Rodríguez, R., Rogger, J. Decidability of order-based modal logics. J. Comput. Syst. Sci. 2017;88:53-74.
http://dx.doi.org/10.1016/j.jcss.2017.03.012