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Sigma KEE - ComplementFn
The complement of a given
C is the
of all things that are not instances of C. In other words, an object is an instance of the complement of a
C just in case it is not an instance of C.
Properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium. Instances of Abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place and time without some physical encoding or embodiment.
s are relations that are true only of pairs of things.
s are represented as slots in frame systems.
The universal class of individuals. This is the root node of the ontology.
is a term-forming
that maps from a n-tuple of arguments to a range and that associates this n-tuple with at most one range element. Note that the range is a
, and each element of the range is an instance of the
The class of
s whose properties can be inherited downward in the class hierarchy via the
of relations. There are two kinds of
s both denote sets of ordered n-tuples. The difference between these two
es is that
s cover formula-forming operators, while
s cover term-forming operators.
single valued relation
just in case an assignment of values to every argument position except the last one determines at most one assignment for the last argument position. Note that not all
total valued relation
just in case there exists an assignment for the last argument position of the
given any assignment of values to every argument position except the last one. Note that declaring a
to be both a
means that it is a total function.
s that require a single argument.
Belongs to Class
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