1############################################################################# 2## 3#W id4.z GAP library of id's Hans Ulrich Besche 4## 5 6ID_GROUP_TREE.next[4]:= 7rec( 8 fp:= [ 1 ], 9 next:= [ rec( 10 fp:= [ 4 ], 11 next:= [ rec( 12 fp:= [ 2 ], 13 next:= [ rec( 14 fp:= [ 12, 13 ], 15 next:= [ 19, 20 ] ) ] ) ] ) ] ); 16