Draft:Gurarij space

In mathematics, a Gurariĭ space (also spelled Gurarii, Gurariy or Gurarij) is a Banach space satisfying some extension properties. They were introduced by Gurariĭ in 1965.

Definition

Properties There is one and only one Gurariĭ separable space up to isometric isomorphism, as proved by Lusky in [2]. A simpler proof has been found by ... [3]