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pro vyhledávání: '"S. Mojtaba Mojtahedi"'
Publikováno v:
The Journal of Symbolic Logic. 84:1118-1135
For the Heyting Arithmetic HA, $HA^{\text{*}} $ is defined [14, 15] as the theory $\left\{ {A|HA \vdash A^\square } \right\}$, where $A^\square $ is called the box translation of A (Definition 2.4). We characterize the ${\text{\Sigma }}_1 $-provabili
Publikováno v:
Annals of Pure and Applied Logic. 169:997-1043
In this paper we introduce a modal theory iH σ which is sound and complete for arithmetical Σ 1 -interpretations in HA , in other words, we will show that iH σ is the Σ 1 -provability logic of HA . Moreover we will show that iH σ is decidable. A
Autor:
S. Mojtaba Mojtahedi
Publikováno v:
Logic Journal of the IGPL. 27:239-251
We can look at a first-order (or propositional) intuitionistic Kripke model as an ordered set of classical models. In this paper, we show that for a finite-depth Kripke model in an arbitrary first-order language or propositional language, local (clas
Publikováno v:
Logic Journal of IGPL. 23:842-847
Publikováno v:
Archive for Mathematical Logic. 53:881-895
We prove that Basic Arithmetic, BA, has the de Jongh property, i.e., for any propositional formula A(p 1,..., p n ) built up of atoms p 1,..., p n , BPC $${\vdash}$$ ? A(p 1,..., p n ) if and only if for all arithmetical sentences B 1,..., B n , BA $
Publikováno v:
Mathematical Logic Quarterly. 60:6-11
Let denote a first-order logic in a language that contains infinitely many constant symbols and also containing intuitionistic logic . By , we mean the associated logic axiomatized by the double negation of the universal closure of the axioms of plus