Rank of a semisimple Lie algebra
= Rank of a semisimple Lie algebra
{title2=$\ell$}
The rank is the dimension of a <Cartan subalgebra>, equivalently the dimension of the real span of its <root system>.
= Rank of a semisimple Lie algebra
{title2=$\ell$}
The rank is the dimension of a <Cartan subalgebra>, equivalently the dimension of the real span of its <root system>.