Bojan Kuzma: Isometries and their roots
Source: Algebra and functional analysis seminar
Abstract: A square of every isometry on a Banach space is again the isometry. The converse of this fact, that is does every isometry have a square root, is wrong in general. We aim to present some special cases of important norms and classify which isometries have square roots.This is joint work with D. Ilisevic.
Roman Drnovšek in Primož Moravec