DeclareOperation( "ProjectionMatrix", [ IsLieAlgebra, IsLieAlgebra ] );

DeclareOperation( "Branching", [ IsLieAlgebra, IsLieAlgebra, IsList ] );

DeclareAttribute( "DirectSumDecomposition", IsAlgebraModule );

DeclareOperation( "CharacteristicsOfStrata", [ IsLieAlgebra, IsList ] );