Results 71 to 80 of about 5,613 (178)

Common Fixed-Point Theorems in Modular Function Spaces Endowed with Reflexive Digraph

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2020
The purpose of this work is to extend the Knaster–Tarski fixed-point theorem to the wider field of reflexive digraph. We give also a DeMarr-type common fixed-point theorem in this context.
Jaauad Jeddi   +2 more
doaj   +1 more source

Finite models for positive combinatorial and exponential algebra

open access: yesBulletin of the London Mathematical Society, Volume 57, Issue 11, Page 3380-3400, November 2025.
Abstract We use high girth, high chromatic number hypergraphs to show that there are finite models of the equational theory of the semiring of non‐negative integers whose equational theory has no finite axiomatisation, and show this also holds if factorial, fixed base exponentiation and operations for binomial coefficients are adjoined.
Tumadhir Alsulami, Marcel Jackson
wiley   +1 more source

Algebraization of Jaśkowski’s Paraconsistent Logic D2

open access: yesStudies in Logic, Grammar and Rhetoric, 2015
The aim of this paper is to present an algebraic approach to Jaśkowski’s paraconsistent logic D2. We present: a D2-discursive algebra, Lindenbaum- Tarski algebra for D2 and D2-matrices.
Ciuciura Janusz
doaj   +1 more source

On generic structures preserving elementary equivalence and elementary embeddability

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2018
We consider criteria for elementary equivalence and elementary embeddability for generic structures. They use classical characterizations for the general case.
S.V. Sudoplatov
doaj   +1 more source

Towards an Independent Version of Tarski's System of Geometry

open access: yesElectronic Proceedings in Theoretical Computer Science
In 1926-1927, Tarski designed a set of axioms for Euclidean geometry which reached its final form in a manuscript by Schwabhäuser, Szmielew and Tarski in 1983. The differences amount to simplifications obtained by Tarski and Gupta.
Boutry, Pierre   +2 more
doaj   +1 more source

Douglas Patterson, Alfred Tarski: Philosophy of Language and Logic.

open access: yesJournal for the History of Analytical Philosophy, 2013
Review of Douglas Patterson. Alfred Tarski: Philosophy of Language and Logic.
Roman Murawski
doaj  

Verdade pragmática

open access: yesEstudos Avançados, 1991
Como se sabe existem, pelo menos, quatro teorias de verdade que se evidenciam de relevância para o filósofo que se ocupa da Teoria da Ciência: 1) a Teoria da Correspondência, particularmente, na forma que lhe confiriu A. Tarski; 2) a Teoria da Coerência;
Jair Minoro Abe
doaj   +1 more source

OPERADORES DE CONSEQUÊNCIA E RELAÇÕES DE CONSEQUÊNCIA

open access: yesKínesis, 2018
Neste artigo analisamos o operador de consequência de Tarski e algumas relações de consequência num ambiente conjuntista de lógica universal. Neste âmbito, mostramos propriedades e axiomas relativos a estas definições que implicam e são implicadas por ...
Hércules de Araújo Feitosa   +2 more
doaj   +1 more source

Positive logics. [PDF]

open access: yesArch Math Log, 2023
Shelah S, Väänänen J.
europepmc   +1 more source

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