/* www-ATLAS of Group Representations. 2L2(19).2i represented as 20 x 20 matrices over GF(3). */ F:=GF(3); x:=CambridgeMatrix(1,F,20,[ "01000000000000000000", "10000000000000000000", "00001000000000000000", "00000100000000000000", "00100000000000000000", "00010000000000000000", "00000000100000000000", "00000000010000000000", "00000010000000000000", "00000001000000000000", "00000000000001000000", "00000000000000100000", "00000000000000001000", "00000000001000000000", "00000000000100000000", "22010101010210221000", "00000000000010000000", "21100011022222202201", "01201212202201212010", "12102012210000000001"]); y:=CambridgeMatrix(1,F,20,[ "00100000000000000000", "00010000000000000000", "20200000000000000000", "22120000000000000000", "00000010000000000000", "00000001000000000000", "11022020000000000000", "00000000001000000000", "00000000000100000000", "00000000000010000000", "00000100000000000000", "00000000000000010000", "00000000000000000100", "00000000000000000010", "00000000000000000001", "00000000100000000000", "10202010110112211111", "00000000010000000000", "01022210101201100002", "22212112000102020011"]); G:=MatrixGroup<20,F|x,y>; print "Group G is 2L2(19).2i < GL(20,GF(3))";