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Now showing items 1-10 of 19

#### On Injective MV-Modules

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

In this paper, by considering the notion of MV-module, which is the structure that naturally correspond to lu-modules over lu-rings, we study injective MV-modules and we investigate some conditions for constructing injective ...

#### On the Definability of Leśniewski’s Copula ‘is’ in Some Ontology-Like Theories

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

We formulate a certain subtheory of Ishimoto’s [1] quantifier-free fragment of Leśniewski’s ontology, and show that Ishimoto’s theory can be reconstructed in it. Using an epimorphism theorem we prove that our theory is ...

#### Rule-Generation Theorem and its Applications

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

In several applications of sequent calculi going beyond pure logic, an introduction of suitably defined rules seems to be more profitable than addition of extra axiomatic sequents. A program of formalization of mathematical ...

#### Labeled Sequent Calculus for Orthologic

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

Orthologic (OL) is non-classical logic and has been studied as a part of quantumlogic. OL is based on an ortholattice and is also called minimal quantum logic.Sequent calculus is used as a tool for proof in logic and has ...

#### Grzegorczyk Algebras Revisited

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

We provide simple algebraic proofs of two important facts, due to Zakharyaschev and Esakia, about Grzegorczyk algebras.

#### A comparison of two systems of point-free topology

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

This is a spin-off paper to [3, 4] in which we carried out an extensive analysis of Andrzej Grzegorczyk’s point-free topology from [5]. In [1] Loredana Biacino and Giangiacomo Gerla presented an axiomatization which was ...

#### A post-style proof of completeness theorem for symmetric relatedness Logic S

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

One of the logic defined by Richard Epstein in a context of an analysis of subject matter relationship is Symmetric Relatedness Logic S. In the monograph [2] we can find some open problems concerning relatedness logic, a ...

#### Identity, equality, nameability and completeness. Part II

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

This article is a continuation of our promenade along the winding roads of identity, equality, nameability and completeness. We continue looking for a place where all these concepts converge. We assume that identity is a ...

#### B-almost distributive fuzzy lattice

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

The paper introduces the concept of B-Almost distributive fuzzy lattice (BADFL) in terms of its principal ideal fuzzy lattice. Necessary and sufficient conditions for an ADFL to become a B-ADFL are investigated. We also ...

#### On interpolation in next (kb.alt(2))

(Wydawnictwo Uniwersytetu Łódzkiego, 2018)

We prove that there is infinitely many tabular modal logics extending KB.Alt(2) which have interpolation.