"Source: Text/Incidence/Plane.text";
"Line: 1652";
"Date: Fri Sep 26 12:10:10 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Incidence/Plane.text, line: 1652
// Example: H154E9 ()
print "Example: H154E9";
ei := GetEchoInput();
SetEchoInput(true);
A, V, L := FiniteAffinePlane(3);
l := L![2, 1];
l;
Slope(l);
assert $1 eq 2;
ParallelClass(l);
[Slope(m): m in ParallelClass(l)];
p := Rep(l);
p;
Pencil(A, p);
SetEchoInput(ei);
