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Complement (set Theory)





RELATIVE COMPLEMENT

If ''A'' and ''B'' are Set s, then the relative complement of ''A''
in ''B'', also known as the set-theoretic difference of ''B'' and ''A'', is the set of elements in ''B'', but not in ''A''.
The relative complement
of ''A'' in ''B''


The relative complement of A in B is usually written ''B'' − ''A'' (also ''B'' \ ''A'').

Formally: