"Source: Text/LieTheory/GrpLie.text";
"Line: 1808";
"Date: Thu Jun 16 15:04:46 2022";
"Main: Thu May 25 10:02:38 2023";
// original file: Text/LieTheory/GrpLie.text, line: 1808
// Example: H110E17 ()
print "Example: H110E17";
ei := GetEchoInput();
SetEchoInput(true);
G := GroupOfLieType("A4",Rationals());
PositiveRoots(G);
H := SubsystemSubgroup(G, [6,1,4]);
H;
PositiveRoots(H);
h := elt<H|<2,2>,1>;
h;  G!h;
SetEchoInput(ei);
