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Take the relation

R:= {<0, 0>, <0, 1>, <0, 2>, <1, 2>}.

We have

domain( R) = {0, 1}range( R) = {0, 1, 2}.

We have domain(**0**) =
range(**0**) = **0**.

Author: Wolfgang Schreiner

Last Modification: October 14, 1999