Yuta Enami

collaborators

3 papers

math.FA2026

Surjective isometries on the positive parts of the unit spheres of some function spaces

Yuta Enami, Daisuke Hirota, Hironao Koshimizu +1

We consider the space $C^{1} [0, 1]$ of continuously differentiable functions on the closed unit interval $[0, 1]$ and the space $Lip [0, 1]$ of Lipschitz continuous fun…

math.FA2026

Globalization of local sign structures for phase-isometries on uniform algebras

Yuta Enami, Daisuke Hirota, Izuho Matsuzaki +1

We study surjective phase-isometries between the unit spheres of uniform algebras. Although such maps preserve maximal convex sets up to signs, the resulting local sign ambiguity p…

math.FA2019

Range preserving maps between the spaces of continuous functions with values in a locally convex space

Yuta Enami

Let $C (X, E)$ be the linear space of all continuous functions on a compact Hausdorff space $X$ with values in a locally convex space $E$ . We characterize maps $T : C (X, E) \to C (Y, E)$ w…