Automorphisms of 3 non-isomorphic systems of type F4E1 system 1 {0,1,2}{3,4,5}{6,7,8,9,10} {0,3,1,6}{2,4,8,10}{5,7,9} {0,4,1,10}{2,7,3,9}{5,6,8} {0,5,1,9}{2,6,3,8}{4,7,10} {0,7,1,8}{2,3,10,5}{4,6,9} has 2 automorphisms 0 1 2 3 4 5 6 7 8 9 10 1 0 2 3 4 5 6 7 8 9 10 r0->r0 r1->r1 r2->r2 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->102,c2:012->012,c3:01234->0123] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 r0->r0 r1->r1 r2->r2 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->012,c2:012->012,c3:01234->0123] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] ------------------------------------------------ system 2 {0,1,2}{3,4,5}{6,7,8,9,10} {0,3,1,6}{2,4,7,9}{5,8,10} {0,4,1,8}{2,3,7,10}{5,6,9} {0,5,2,7}{1,9,3,10}{4,6,8} {0,9,4,10}{2,6,3,8}{1,5,7} has 1 automorphisms 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 r0->r0 r1->r1 r2->r2 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->012,c2:012->012,c3:01234->0123] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] ------------------------------------------------ system 3 {0,1,2}{3,4,5}{6,7,8,9,10} {0,3,1,6}{2,4,7,9}{5,8,10} {0,4,1,8}{2,3,7,10}{5,6,9} {0,5,1,7}{3,9,4,10}{2,6,8} {0,9,1,10}{3,6,4,8}{2,5,7} has 4 automorphisms 0 1 2 3 4 5 6 7 8 9 10 1 0 2 4 3 5 8 7 6 10 9 r0->r0 r1->r2 r2->r1 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->102,c2:012->102,c3:01234->2104] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->2301,c3:012->021] [c1->c1,c2->c2,c3->c3,c1:0123->2301,c2:0123->2301,c3:012->012] 0 1 2 3 4 5 6 7 8 9 10 0 1 2 4 3 5 8 7 6 10 9 r0->r0 r1->r2 r2->r1 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->012,c2:012->102,c3:01234->2104] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->2301,c3:012->021] [c1->c1,c2->c2,c3->c3,c1:0123->0321,c2:0123->2301,c3:012->012] 0 1 2 3 4 5 6 7 8 9 10 1 0 2 3 4 5 6 7 8 9 10 r0->r0 r1->r1 r2->r2 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->102,c2:012->012,c3:01234->0123] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->2103,c2:0123->0123,c3:012->012] 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 r0->r0 r1->r1 r2->r2 r3->r3 r4->r4 [c1->c1,c2->c2,c3->c3,c1:012->012,c2:012->012,c3:01234->0123] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] [c1->c1,c2->c2,c3->c3,c1:0123->0123,c2:0123->0123,c3:012->012] ------------------------------------------------