Bulletin of the Section of Logic: Recent submissions

Now showing items 81-100 of 230

    • Constructing a Hoop Using Rough Filters 

      Borzooei, Rajab Ali; Babaei, Elham (Wydawnictwo Uniwersytetu Łódzkiego, 2022-09-09)
      When it comes to making decisions in vague problems, rough is one of the best tools to help analyzers. So based on rough and hoop concepts, two kinds of approximations (Lower and Upper) for filters in hoops are defined, ...

    • Unification and Finite Model Property for Linear Step-Like Temporal Multi-Agent Logic with the Universal Modality 

      Bashmakov, Stepan I.; Zvereva, Tatyana Yu. (Wydawnictwo Uniwersytetu Łódzkiego, 2022-09-09)
      This paper proposes a semantic description of the linear step-like temporal multi-agent logic with the universal modality \(\mathcal{LTK}.sl_U\) based on the idea of non-reflexive non-transitive nature of time. We proved ...

    • Categorical Dualities for Some Two Categories of Lattices: An Extended Abstract 

      Dziobiak, Wiesław; Schwidefsky, Marina (Wydawnictwo Uniwersytetu Łódzkiego, 2022-08-02)
      The categorical dualities presented are: (first) for the category of bi-algebraic lattices that belong to the variety generated by the smallest non-modular lattice with complete (0,1)-lattice homomorphisms as morphisms, ...

    • First-Order Modal Semantics and Existence Predicate 

      Michalczenia, Patryk (Wydawnictwo Uniwersytetu Łódzkiego, 2022-07-11)
      In the article we study the existence predicate \(\varepsilon\) in the context of semantics for first-order modal logic. For a formula \(\varphi\) we define \(\varphi^{\varepsilon}\) - the so called existence relativization. ...

    • Interpolation Property on Visser's Formal Propositional Logic 

      Alizadeh, Majid; Memarzadeh, Masoud (Wydawnictwo Uniwersytetu Łódzkiego, 2022-09-20)
       In this paper by using a model-theoretic approach, we prove Craig interpolation property for Formal Propositional Logic, FPL, Basic propositional logic, BPL and the uniform left-interpolation property for FPL. We also ...

    • Tableaux for some deontic logics with the explicit permission operator 

      Glavaničová, Daniela; Jarmużek, Tomasz; Klonowski, Mateusz; Kulicki, Piotr (Wydawnictwo Uniwersytetu Łódzkiego, 2022-06-23)
      In this paper we present a tableau system for deontic logics with the operator of explicit permission. By means of this system the decidability of the considered logics can be proved. We will sketch how these logics are ...

    • A Paradox for the Existence Predicate 

      Meixner, Uwe (Wydawnictwo Uniwersytetu Łódzkiego, 2022-06-10)
      In this paper, a paradox is shown to arise in the context of classical logic from prima facie highly plausible assumptions for the existence predicate as applied to definite descriptions. There are several possibilities ...

    • A Classification of Improper Inference Rules 

      Sasaki, Katsumi (Wydawnictwo Uniwersytetu Łódzkiego, 2022-06-23)
      In the natural deduction system for classical propositional logic given by G. Gentzen, there are some inference rules with assumptions discharged by the rule. D. Prawitz calls such inference rules improper as opposed to ...

    • A Benchmark Similarity Measures for Fermatean Fuzzy Sets 

      Khan, Faiz Muhammad; Khan, Imran; Ahmad, Waqas (Wydawnictwo Uniwersytetu Łódzkiego, 2022-06-08)
      In this paper, we utilized triangular conorms (S-norm). The essence of using S-norm is that the similarity order does not change using different norms. In fact, we are investigating for a new conception for calculating the ...

    • A Variant of Material Connexive Logic 

      Belikov, Alexander; Zaitsev, Dmitry (Wydawnictwo Uniwersytetu Łódzkiego, 2021-11-09)
      The relationship between formal (standard) logic and informal (common-sense, everyday) reasoning has always been a hot topic. In this paper, we propose another possible way to bring it up inspired by connexive logic. Our ...

    • Tolerating Inconsistencies: A Study of Logic of Moral Conflicts 

      Mishra, Meha; Sarma, A.V. Ravishankar (Wydawnictwo Uniwersytetu Łódzkiego, 2022-06-07)
      Moral conflicts are the situations which emerge as a response to deal with conflicting obligations or duties. An interesting case arises when an agent thinks that two obligations A and B are equally important, but yet fails ...

    • Proof Compression and NP Versus PSPACE II: Addendum 

      Gordeev, Lew; Haeusler, Edward Hermann (Wydawnictwo Uniwersytetu Łódzkiego, 2022-01-07)
      In our previous work we proved the conjecture NP = PSPACE by advanced proof theoretic methods that combined Hudelmaier’s cut-free sequent calculus for minimal logic (HSC) with the horizontal compressing in the corresponding ...

    • Models of Bounded Arithmetic Theories and Some Related Complexity Questions 

      Alam, Abolfazl; Moniri, Morteza (Wydawnictwo Uniwersytetu Łódzkiego, 2022-06-07)
      In this paper, we study bounded versions of some model-theoretic notions and results. We apply these results to the context of models of bounded arithmetic theories as well as some related complexity questions. As an ...

    • Analytic Non-Labelled Proof-Systems for Hybrid Logic: Overview and a couple of striking facts 

      Braüner, Torben (Wydawnictwo Uniwersytetu Łódzkiego, 2022-01-07)
      This paper is about non-labelled proof-systems for hybrid logic, that is, proofsystems where arbitrary formulas can occur, not just satisfaction statements. We give an overview of such proof-systems, focusing on analytic ...

    • Weakly Free Multialgebras 

      Coniglio, Marcelo Esteban; Vicentin de Toledo, Guilherme (Wydawnictwo Uniwersytetu Łódzkiego, 2021-08-23)
      In abstract algebraic logic, many systems, such as those paraconsistent logics taking inspiration from da Costa's hierarchy, are not algebraizable by even the broadest standard methodologies, as that of Blok and Pigozzi. ...

    • A Sequent Systems without Improper Derivations 

      Sasaki, Katsumi (Wydawnictwo Uniwersytetu Łódzkiego, 2021-10-14)
      In the natural deduction system for classical propositional logic given by G. Gentzen, there are some inference rules with assumptions discharged by the rule. D. Prawitz calls such inference rules improper, and others ...

    • Sequent Calculi for Orthologic with Strict Implication 

      Kawano, Tomoaki (Wydawnictwo Uniwersytetu Łódzkiego, 2021-11-09)
      In this study, new sequent calculi for a minimal quantum logic (\(\bf MQL\)) are discussed that involve an implication. The sequent calculus \(\bf GO\) for \(\bf MQL\) was established by Nishimura, and it is complete with ...

    • A Note on the Intuitionistic Logic of False Belief 

      Witczak, Tomasz (Wydawnictwo Uniwersytetu Łódzkiego, 2021-09-01)
      In this paper we analyse logic of false belief in the intuitionistic setting. This logic, studied in its classical version by Steinsvold, Fan, Gilbert and Venturi, describes the following situation: a formula $\varphi$ is ...

    • Ternary Relational Semantics for the Variants of BN4 and E4 which Contain Routley and Meyer's Logic B 

      López, Sandra M. (Wydawnictwo Uniwersytetu Łódzkiego, 2021-09-02)
      Six interesting variants of the logics BN4 and E4—which can be considered as the 4-valued logics of the relevant conditional and (relevant) entailment, respectively—were previously developed in the literature. All these ...

    • An Epistemological Study of Theory Change 

      Aravanis, Theofanis (Wydawnictwo Uniwersytetu Łódzkiego, 2021-11-09)
      Belief Revision is a well-established field of research that deals with how agents rationally change their minds in the face of new information. The milestone of Belief Revision is a general and versatile formal framework ...