"Source: Text/Incidence/Design.text";
"Line: 2254";
"Date: Fri Sep 26 12:10:10 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Incidence/Design.text, line: 2254
// Example: H160E10 ()
print "Example: H160E10";
ei := GetEchoInput();
SetEchoInput(true);
R := MatrixRing(Integers(), 4);
H := R ! [1,1,1,-1, 1,1,-1,1, 1,-1,1,1, -1,1,1,1];
L := TensorProduct(H, -H);
D, P, B := HadamardRowDesign(L, 1);
D;
G, pg, bg, A, t := AutomorphismGroup(D);
G;
CompositionFactors(G);
SetEchoInput(ei);
