2.2 Relation

Relation( list )

Relation returns the binary relation defined by the list list of subsets of {1, ..., n} where n is the length of list.

    gap> Relation( [ [ 1, 2 ], [ ], [ 3, 1 ] ] );
    Relation( [ [ 1, 2 ], [  ], [ 1, 3 ] ] ) 

Alternatively, list can be a list of boolean lists of length n, each of which is interpreted as a subset of {1, ..., n} (see chapter "Boolean Lists").

    gap> Relation( [ 
    > [ true, true, false ],
    > [ false, false, false ],
    > [ true, false, true ] ] ); 
    Relation( [ [ 1, 2 ], [  ], [ 1, 3 ] ] ) 

   
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