Quasitopoi, logic and heyting-valued models
نویسندگان
چکیده
منابع مشابه
Heyting-valued interpretations for Constructive Set Theory
The theory of locales [23] has a twofold interplay with intuitionistic mathematics: first of all, the internal logic of toposes and intuitionistic set theories provide suitable settings for the development of the theory of locales [24], and secondly, the notion of a locale determines two important forms of toposes and of interpretations for intuitionistic set theories, namely localic toposes [2...
متن کاملHeyting-Brouwer Rough Set Logic
A rough set logic based on Heyting-Brouwer algebras HBRSL is proposed as a basis for reasoning about rough information. It is an extension of Düntsch’s logic with intuitionistic implication, and is seen as a variant of HeytingBrouwer logic. A Kripke semantics and natural deduction for the logic are presented and the completeness theorem is proved.
متن کاملThe Logic of Brouwer and Heyting
Intuitionistic logic consists of the principles of reasoning which were used informally by L. E. J. Brouwer, formalized by A. Heyting (also partially by V. Glivenko), interpreted by A. Kolmogorov, and studied by G. Gentzen and K. Gödel during the first third of the twentieth century. Formally, intuitionistic first-order predicate logic is a proper subsystem of classical logic, obtained by repla...
متن کاملThe completeness of Heyting first-order logic
Restricted to first-order formulas, the rules of inference in the Curry-Howard type theory are equivalent to those of first-order predicate logic as formalized by Heyting, with one exception: ∃-elimination in the Curry-Howard theory, where ∃x : A.F (x) is understood as disjoint union, are the projections, and these do not preserve firstorderedness. This note shows, however, that the Curry-Howar...
متن کاملNotions of Bisimulation for Heyting-Valued Modal Languages
We examine the notion of bisimulation and its ramifications, in the context of the family of Heyting-valued modal languages introduced by M. Fitting. Each modal language in this family is built on an underlying space of truth values, a Heyting algebra H. All the truth values are directly represented in the language, which is interpreted on relational frames with an H-valued accessibility relati...
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ژورنال
عنوان ژورنال: Journal of Pure and Applied Algebra
سال: 1986
ISSN: 0022-4049
DOI: 10.1016/0022-4049(86)90077-0