On the total curvature and extrinsic area growth of surfaces with tamed second fundamental form

TL;DR

This paper establishes conditions under which surfaces with tamed second fundamental form in Euclidean space have finite total curvature and explores their geometric properties, including inequalities and classifications.

Contribution

It introduces the concept of tamed second fundamental form to relate extrinsic area growth with total curvature and provides new inequalities and classifications for such surfaces.

Findings

Surfaces with quadratic extrinsic area growth and tamed second fundamental form have finite total curvature.

A generalized Chern-Osserman inequality is derived for these surfaces.

Surfaces with nonnegative curvature and tamed second fundamental form are diffeomorphic or isometric to the Euclidean plane.

Abstract

In this paper we show that a complete and non-compact surface immersed in the Euclidean space with quadratic extrinsic area growth has finite total curvature provided the surface has tamed second fundamental form and admits total curvature. In such a case we obtain as well a generalized Chern-Osserman inequality. In the particular case of a surface of nonnegative curvature, we prove that the surface is diffeomorphic to the Euclidean plane if the surface has tamed second fundamental form, and that the surface is isometric to the Euclidean plane if the surface has strongly tamed second fundamental form. In the last part of the paper we characterize the fundamental tone of any submanifold of tamed second fundamental form immersed in an ambient space with a pole and quadratic decay of the radial sectional curvatures.