Root system
= Root system
{wiki}
A root system is a finite set of nonzero vectors closed under the reflections they define and satisfying the crystallographic integrality condition when it arises from a semisimple <Lie algebra>.
= Root system
{wiki}
A root system is a finite set of nonzero vectors closed under the reflections they define and satisfying the crystallographic integrality condition when it arises from a semisimple <Lie algebra>.