2 papers
math.DG2016
Riemannian Rigidity of the Parallel Postulate in Total Curvature
Jian Ge, Luis Guijarro, Pedro Solórzano
We prove that the Euclidean plane is the only Riemannian plane with total curvature and free of conjugate points that satisfies Playfair's version of the parallel postulate.
math.DG2010
Holonomic Spaces
Pedro Solórzano
A holonomic space is a normed vector space, , a subgroup, , of and a group-norm, , with a convexity property. We prove that with the metric $…