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# relative complement fn (RelativeComplementFn)

A BinaryFunction that maps two SetOrClasses to the difference between these SetOrClasses. More precisely, the relative complement of one class C1 relative to another C2 consists of the instances of C1 that are instances of the ComplementFn of C2.

## Ontology

SUMO / SET/CLASS-THEORY

## Class(es)

 varga

inheritable relation

relative complement fn

## Coordinate term(s)

addition fn  day fn  density fn  division fn  edition fn  exponentiation fn  graph path fn  hour fn  intersection fn  interval fn  kappa fn  list concatenate fn  list order fn  log fn  max fn  maximal weighted path fn  measure fn  mereological difference fn  mereological product fn  mereological sum fn  min fn  minimal weighted path fn  minute fn  month fn  multiplication fn  periodical issue fn  recurrent time interval fn  relative time fn  remainder fn  second fn  series volume fn  speed fn  subtraction fn  temporal composition fn  time interval fn  union fn  where fn

## Type restrictions

samUha yaa varga RelativeComplementFn(samUha yaa varga, samUha yaa varga)

## Axioms (1)

Agar class1 is an instance of samUha yaa varga aur class2 is an instance of samUha yaa varga, to "the difference between class1 and class2" is equal to "the union of class1 and "the complement of class2"".
```(=>
(and
(instance ?CLASS1 SetOrClass)
(instance ?CLASS2 SetOrClass))
(equal
(RelativeComplementFn ?CLASS1 ?CLASS2)
(IntersectionFn
?CLASS1
(ComplementFn ?CLASS2))))```