"Source: Text/Incidence/Design.text";
"Line: 2254";
"Date: Sat Nov  9 18:06:06 2019";
"Main: Thu May 25 10:02:38 2023";
// original file: Text/Incidence/Design.text, line: 2254
// Example: H156E10 ()
print "Example: H156E10";
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);
