2 citations · 2 across the 3 of their papers we have counts for
3 papers
math.DG2018★ 2 cited
Berwald spaces of bounded curvature are Riemannian
Nathaphon Boonnam, Rattanasak Hama, Sorin V. Sabau
We prove that Berwald spaces whose flag curvature is nowhere vanishing are in fact Riemannian spaces. This means that any Berwald space with flag curvature bounded below by a posit…
math.DG2016
A generalized maximal diameter sphere theorem
Nathaphon Boonnam
We prove that if a complete connected -dimensional Riemannian manifold has radial sectional curvature at a base point bounded from below by the radial curvature fun…
math.DG2013
Maximal diameter sphere theorem for manifolds with nonconstant radial curvature
Nathaphon Boonnam
We generalize the maximal diameter sphere theorem due to Toponogov by means of the radial curvature. As a corollary to our main theorem, we prove that for a complete connected Riem…