Intuitionistic Modal Algebras

• Autores: Celani, Sergio Arturo; Rivieccio, Umberto
• Año de publicación: 2023
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: FRAGMENTS; IMPLICATIVE SEMILATTICES; INTUITIONISTIC MODAL ALGEBRAS; NUCLEAR HEYTING ALGEBRAS; NUCLEI; QUASI-NELSON ALGEBRAS; REPRESENTATION; TOPOLOGICAL DUALITY; WEAK HEYTING ALGEBRAS
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Recent research on algebraic models of quasi-Nelson logic has brought new attention to a number of classes of algebras which result from enriching (subreducts of) Heyting algebras with a special modal operator, known in the literature as a nucleus. Among these various algebraic structures, for which we employ the umbrella term intuitionistic modal algebras, some have been studied since at least the 1970s, usually within the framework of topology and sheaf theory. Others may seem more exotic, for their primitive operations arise from algebraic terms of the intuitionistic modal language which have not been previously considered. We shall for instance investigate the variety of weak implicative semilattices, whose members are (non-necessarily distributive) meet semilattices endowed with a nucleus and an implication operation which is not a relative pseudo-complement but satisfies the postulates of Celani and Jansana’s strict implication. For each of these new classes of algebras we establish a representation and a topological duality which generalize the known ones for Heyting algebras enriched with a nucleus.
Fil: Celani, Sergio Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires; Argentina
Fil: Rivieccio, Umberto. Universidad Nacional de Educación a Distancia; España