"Source: Text/Algebra/AlgLie.text";
"Line: 2871";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Algebra/AlgLie.text, line: 2871
// Example: H110E30 ()
print "Example: H110E30";
ei := GetEchoInput();
SetEchoInput(true);
L := LieAlgebra("D7", RationalField());
L;
K := Centralizer(L, sub<L | [L.1,L.2,L.3,L.4]>);
K;
_,S := HasLeviSubalgebra(K);
S;
SemisimpleType(S);
SetEchoInput(ei);
