Results 41 to 50 of about 209,396 (188)

Mapping-equivalence and oid-equivalence of single-function object-creating conjunctive queries

open access: yes, 2016
Conjunctive database queries have been extended with a mechanism for object creation to capture important applications such as data exchange, data integration, and ontology-based data access. Object creation generates new object identifiers in the result,
Bonifati, Angela   +3 more
core   +2 more sources

A logical basis for constructive systems

open access: yes, 2011
The work is devoted to Computability Logic (CoL) -- the philosophical/mathematical platform and long-term project for redeveloping classical logic after replacing truth} by computability in its underlying semantics (see http://www.cis.upenn.edu/~giorgi ...
Japaridze, Giorgi
core   +1 more source

A Critical Remark on the BHK Interpretation of Implication

open access: yesPhilosophia Scientiæ, 2014
The BHK interpretation of logical constants is analyzed in terms of a systematic account given by Prawitz, resulting in a reformulation of the BHK interpretation in which the assertability of atomic propositions is determined by Post systems. It is shown
Wagner de Campos Sanz, Thomas Piecha
doaj   +1 more source

The Problem of Logical Constants

open access: yesThe Bulletin of Symbolic Logic, 2002
AbstractThere have been several different and even opposed conceptions of the problem of logical constants, i.e., of the requirements that a good theory of logical constants ought to satisfy. This paper is in the first place a survey of these conceptions and a critique of the theories they have given rise to. A second aim of the paper is to sketch some
openaire   +2 more sources

Definite Formulae, Negation-as-Failure, and the Base-Extension Semantics of Intuitionistic Propositional Logic

open access: yesBulletin of the Section of Logic, 2023
Proof-theoretic semantics (P-tS) is the paradigm of semantics in which meaning in logic is based on proof (as opposed to truth). A particular instance of P-tS for intuitionistic propositional logic (IPL) is its base-extension semantics (B-eS).
Alexander V. Gheorghiu, David J. Pym
doaj   +1 more source

Extensional Collapse Situations I: non-termination and unrecoverable errors [PDF]

open access: yes, 2010
We consider a simple model of higher order, functional computation over the booleans. Then, we enrich the model in order to encompass non-termination and unrecoverable errors, taken separately or jointly. We show that the models so defined form a lattice
Bucciarelli, Antonio
core   +3 more sources

Chinese Research on Mathematical Logic and the Foundations of Mathematics

open access: yesAsian Studies, 2022
This paper outlines the Chinese research on mathematical logic and the foundations of mathematics. Firstly, it presents the introduction and spread of mathematical logic in China, especially the teaching and translation of mathematical logic initiated ...
Hongguang Wang, Guoping Du
doaj   +1 more source

Perspectives hétérodoxes de Russell sur la question des fondements

open access: yesPhilosophia Scientiæ, 2005
Russell’s logicism consists of a thesis stating that all pure mathematics can be expressed in terms of logical constants and variables. It is usually assumed to be a reduction of pure mathematics to logic.
Anne-Françoise Schmid
doaj   +1 more source

Logical strength of complexity theory and a formalization of the PCP theorem in bounded arithmetic

open access: yes, 2015
We present several known formalizations of theorems from computational complexity in bounded arithmetic and formalize the PCP theorem in the theory PV1 (no formalization of this theorem was known).
Pich, Ján
core   +1 more source

A continuous-time stochastic Boolean model provides a quantitative description of the budding yeast cell cycle

open access: yesScientific Reports, 2022
The cell division cycle is regulated by a complex network of interacting genes and proteins. The control system has been modeled in many ways, from qualitative Boolean switching-networks to quantitative differential equations and highly detailed ...
Teeraphan Laomettachit   +2 more
doaj   +1 more source

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