Gelfand-Mazur theorem
= Gelfand-Mazur theorem
{c}
{wiki=Gelfand–Mazur_theorem}
Every complex unital Banach algebra in which every nonzero element is invertible is isometrically isomorphic to $\mathbb C$.
= Gelfand-Mazur theorem
{c}
{wiki=Gelfand–Mazur_theorem}
Every complex unital Banach algebra in which every nonzero element is invertible is isometrically isomorphic to $\mathbb C$.