63.18 IsLoopy

IsLoopy( gamma )

This boolean function returns true if and only if the graph gamma has a loop, that is, an edge of the form [x,x].

    gap> IsLoopy( JohnsonGraph( 4, 2 ) );
    false
    gap> IsLoopy( CompleteGraph( Group( (1,2,3), (1,2) ), 3 ) );
    false
    gap> IsLoopy( CompleteGraph( Group( (1,2,3), (1,2) ), 3, true ) );
    true 

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