=== Base Template !RelativeComplementOf2Classes ===
[[br]]!RelativeComplementOf2Classes is a template for expressing that a class is the relative complement of two classes.
[[br]]
[[br]]!RelativeComplementOf2Classes(a, b, c) means that c is the relative complement of a and b.
[[br]]
[[br]]Roles:
[[br]]1 hasClass1 Class
[[br]]2 hasClass2 Class
[[br]]3 hasClassRelativeComplement Class
Axiom:
{{{
RelativeComplementOf2Classes(x1, x2, x3) <->
Class(x1) &
Class(x2) &
Class(x3) &
exists y(DifferenceOf2Classes(x1, x2, y) &
IntersectionOf2Classes(x1, y, x3)) .
}}}
NOTE The relative complement of two classes a and b is commonly written anb. See 8.3 for further information on the representation used in this template.