Gauss-Bonnet theorems in the affine group and the group of rigid motions of the Minkowski plane
arXiv:1912.00302
Abstract
In this paper, we compute sub-Riemannian limits of Gaussian curvature for a Euclidean -smooth surface in the affine group and the group of rigid motions of the Minkowski plane away from characteristic points and signed geodesic curvature for Euclidean -smooth curves on surfaces. We get Gauss-Bonnet theorems in the affine group and the group of rigid motions of the Minkowski plane.
It has been accepted for publication in SCIENCE CHINA Mathematics