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ON TARSKI’S AXIOMATIC FOUNDATIONS OF THE CALCULUS OF RELATIONS

Published online by Cambridge University Press:  08 May 2017

HAJNAL ANDRÉKA
Affiliation:
ALFRÉD RÉNYI INSTITUTE OF MATHEMATICS HUNGARIAN ACADEMY OF SCIENCES H-1364BUDAPEST, PF. 127 HUNGARYE-mail: [email protected]
STEVEN GIVANT
Affiliation:
MILLS COLLEGE DEPARTMENT OF MATHEMATICS AND COMPUTER SCIENCE 5000 MACARTHUR BOULEVARD OAKLAND, CA 94613, USAE-mail:[email protected]
PETER JIPSEN
Affiliation:
CHAPMAN UNIVERSITY, FACULTY OF MATHEMATICS SCHOOL OF COMPUTATIONAL SCIENCES 545 WEST PALM AVENUE ORANGE, CA 92866, USAE-mail:[email protected]
ISTVÁN NÉMETI
Affiliation:
ALFRÉD RÉNYI INSTITUTE OF MATHEMATICS HUNGARIAN ACADEMY OF SCIENCESH-1364BUDAPEST, PF. 127 HUNGARYE-mail:[email protected]

Abstract

It is shown that Tarski’s set of ten axioms for the calculus of relations is independent in the sense that no axiom can be derived from the remaining axioms. It is also shown that by modifying one of Tarski’s axioms slightly, and in fact by replacing the right-hand distributive law for relative multiplication with its left-hand version, we arrive at an equivalent set of axioms which is redundant in the sense that one of the axioms, namely the second involution law, is derivable from the other axioms. The set of remaining axioms is independent. Finally, it is shown that if both the left-hand and right-hand distributive laws for relative multiplication are included in the set of axioms, then two of Tarski’s other axioms become redundant, namely the second involution law and the distributive law for converse. The set of remaining axioms is independent and equivalent to Tarski’s axiom system.

Type
Articles
Copyright
Copyright © The Association for Symbolic Logic 2017 

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References

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