Revista de la Unión Matemática Argentina
versão impressa ISSN 0041-6932
RUEDA, Laura A.. The subvariety of Q-Heyting algebras generated by chains. Rev. Unión Mat. Argent. [online]. 2009, vol.50, n.1, pp. 47-59. ISSN 0041-6932.
The variety of Heyting algebras with a quantifier  corresponds to the algebraic study of the modal intuitionistic propositional calculus without the necessity operator. This paper is concerned with the subvariety of generated by chains. We prove that this subvariety is characterized within by the equations and . We investigate free objects in .