Now showing items 1-5 of 5

    • Simple Decision Procedure for S5 in Standard Cut-Free Sequent Calculus 

      Indrzejczak, Andrzej (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      In the paper a decision procedure for S5 is presented which uses a cut-free sequent calculus with additional rules allowing a reduction to normal modal forms. It utilizes the fact that in S5 every formula is equivalent to ...
    • A 2-set-up Routley-Meyer Semantics for the 4-valued Relevant Logic E4 

      Robles, Gemma; López, Sandra M.; Blanco, José M.; Recio, Marcos M.; Paradela, Jesús R. (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      The logic BN4 can be considered as the 4-valued logic of the relevant conditional and the logic E4, as the 4-valued logic of (relevant) entailment. The aim of this paper is to endow E4 with a 2-set-up Routley-Meyer semantics. ...
    • Categorical Abstract Logic: Hidden Multi-Sorted Logics as Multi-Term Institutions 

      Voutsadakis, George (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      Babenyshev and Martins proved that two hidden multi-sorted deductive systems are deductively equivalent if and only if there exists an isomorphism between their corresponding lattices of theories that commutes with ...
    • Quasiorders, Tolerance Relations and Corresponding “Partitions” 

      Nowak, Marek (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      The paper deals with a generalization of the notion of partition for wider classes of binary relations than equivalences: for quasiorders and tolerance relations. The counterpart of partition for the quasiorders is based ...
    • Axiomatization of a Basic Logic of Logical Bilattices 

      Takano, Mitio (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      A sequential axiomatization is given for the 16-valued logic that has been proposed by Shramko-Wansing (J Philos Logic 34:121–153, 2005) as a candidate for the basic logic of logical bilattices.