/*
www-ATLAS of Group Representations.
2.A7 represented as 4 x 4 matrices over GF(25).
*/

F<w>:=GF(25);

x:=CambridgeMatrix(3,F,4,\[
0,1,0,0,
4,4,0,0,
0,0,0,1,
0,0,4,4]);

y:=CambridgeMatrix(3,F,4,\[
0,0,1,0,
0,4,4,0,
4,21,1,1,
0,4,20,4]);

G<x,y>:=MatrixGroup<4,F|x,y>;
print "Group G is 2.A7 < GL(4,GF(25))";