Lévy–Steinitz theorem
= Lévy–Steinitz theorem
{wiki=Lévy–Steinitz_theorem}
The Lévy–Steinitz theorem is a result in convex geometry and functional analysis that deals with the characterization of certain linear combinations of sequences of vectors in the context of normed spaces. More specifically, it pertains to the conditions under which a finite sequence of vectors can be expressed as a convex combination of a possibly larger collection of vectors.