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COMPLETE LOGICS FOR ELEMENTARY TEAM PROPERTIES

Published online by Cambridge University Press:  01 December 2022

JUHA KONTINEN
Affiliation:
DEPARTMENT OF MATHEMATICS AND STATISTICS UNIVERSITY OF HELSINKI PL 68 (PIETARI KALMIN KATU 5) 00014, HELSINKI FINLAND E-mail: juha.kontinen@helsinki.fi
FAN YANG*
Affiliation:
DEPARTMENT OF MATHEMATICS AND STATISTICS UNIVERSITY OF HELSINKI PL 68 (PIETARI KALMIN KATU 5) 00014, HELSINKI FINLAND E-mail: juha.kontinen@helsinki.fi

Abstract

In this paper, we introduce a logic based on team semantics, called $\mathbf {FOT} $ , whose expressive power is elementary, i.e., coincides with first-order logic both on the level of sentences and (possibly open) formulas, and we also show that a sublogic of $\mathbf {FOT} $ , called $\mathbf {FOT}^{\downarrow } $ , captures exactly downward closed elementary (or first-order) team properties. We axiomatize completely the logic $\mathbf {FOT} $ , and also extend the known partial axiomatization of dependence logic to dependence logic enriched with the logical constants in $\mathbf {FOT}^{\downarrow } $ .

MSC classification

Type
Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of The Association for Symbolic Logic

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