On the Mutual Definability of the Notions of Entailment, Rejection, and Inconsistency

نویسنده

  • Urszula Wybraniec-Skardowska
چکیده

In this paper, two axiomatic theories T ́ and T1 are constructed, which are dual to Tarski’s theory T+ (1930) of deductive systems based on classical propositional calculus. While in Tarski’s theory T+ the primitive notion is the classical consequence function (entailment) Cn+, in the dual theory T ́ it is replaced by the notion of Słupecki’s rejection consequence Cn ́ and in the dual theory T1 it is replaced by the notion of the family Incons of inconsistent sets. The author has proved that the theories T+, T ́, and T1 are equivalent.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Examples of approximations in diagnosis based on approximate entailment

The AI literature contains many de nitions of diagnostic reasoning (such as set-covering, abductive, consistency-based). However, diagnosis should not be seen as a problem with a unique de nition. Instead, there exists a whole space of reasonable notions of diagnosis. These notions can be seen as mutual approximations. We use existing work approximate entailment to de ne notions of approximatio...

متن کامل

Dynamic Bayesian Information Measures

This paper introduces measures of information for Bayesian analysis when the support of data distribution is truncated progressively. The focus is on the lifetime distributions where the support is truncated at the current age t>=0. Notions of uncertainty and information are presented and operationalized by Shannon entropy, Kullback-Leibler information, and mutual information. Dynamic updatings...

متن کامل

On the compactness property of extensions of first-order G"{o}del logic

We study three kinds of compactness in some variants of G"{o}del logic: compactness,entailment compactness, and approximate entailment compactness.For countable first-order underlying language we use the Henkinconstruction to prove the compactness property of extensions offirst-order g logic enriched by nullary connective or the Baaz'sprojection connective. In the case of uncountable first-orde...

متن کامل

Modal Definability Based on Łukasiewicz Validity Relations

We study two notions of definability for classes of relational structures based on modal extensions of Łukasiewicz finitely-valued logics. The main results of the paper are the equivalent of the Goldblatt Thomason theorem for these notions of definability.

متن کامل

On Definability in Multimodal Logic

Three notions of definability in multimodal logic are considered. Two are analogous to the notions of explicit definability and implicit definability introduced by Beth in the context of first-order logic. However, while by Beth’s theorem the two types of definability are equivalent for first-order logic, such an equivalence does not hold for multimodal logics. A third notion of definability, r...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Axioms

دوره 5  شماره 

صفحات  -

تاریخ انتشار 2016