"Source: Text/LieTheory/GrpRfl.text";
"Line: 1542";
"Date: Fri Sep 26 12:10:11 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/LieTheory/GrpRfl.text, line: 1542
// Example: H109E18 ()
print "Example: H109E18";
ei := GetEchoInput();
SetEchoInput(true);
W := ReflectionGroup("E6");
degs := BasicDegrees(W);
degs;
&*degs eq #W;
assert $1;
&+degs eq NumPosRoots(W) + Rank(W);
assert $1;
SetEchoInput(ei);
