Parts, wholes, and part-whole relations: the prospects of mereotopology
Data & Knowledge Engineering - Special issue on modeling parts and wholes
Mereotopology: a theory of parts and boundaries
Data & Knowledge Engineering - Special issue on modeling parts and wholes
Part-whole relations in object-centered systems: an overview
Data & Knowledge Engineering - Special issue on modeling parts and wholes
A mathematical analysis of theories of parthood
Data & Knowledge Engineering
A framework in prolog for computing structural relationships
Data & Knowledge Engineering
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We discuss the axiomatic base of some of the most prominent theories of parthood (mereologies), in particular of General (Classical) Extensional Mereology (GEM). Parthood is axiomatized in GEM as a partial ordering to which a supplementation axiom and a general summing axiom are added. In this paper, we disprove the common assumption that it makes no difference for the strength of the resulting theory whether in the above framework the so-called Strong or the Weak Supplementation Principle is taken as supplementation axiom. We further show some more counterexamples to common assertions from literature concerning the interdependance of some of the axioms of the various mereological theories. It turns out that only the Strong Supplementation Principle is sufficient to fit the theories with a strong kind of extensionality.