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20152026
most citedCosmological evolution and dark energy in osculating Barthel-Randers geometry

43 citations · 138 across the 13 of their papers we have counts for

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math.DG2026

From dual connections to gravitational field equations -- the curvature and Einstein tensors of the - connection of a quasi-statistical manifold

Rattanasak Hama, Tiberiu Harko, Sorin V. Sabau

We present a detailed review of the mathematical foundations of the theory of the statistical and quasi-statistical manifolds, which recently have found many applications in genera…

math.DG2023

Randers metrics on two-spheres of revolution with simple cut locus

Rattanasak Hama, Sorin V. Sabau

In the present paper, we study the Randers metric on two-spheres of revolution in order to obtain new families of Finsler of Randers type metrics with simple cut locus. We determin…

math.DG2021

The geometry of a Randers rotational surface with an arbitrary direction wind

Rattanasak Hama, Sorin V. Sabau

In the present paper we study the global behaviour of geodesics on a Randers metric, defined on a topological cylinder, obtained as the solution of the Zermelo's navigation problem…

math.DG2018

The cut locus of a Randers rotational 2-sphere of revolution

Rattanasak Hama, Jaipong Kasemsuwan, Sorin V. Sabau

In the present paper we study the structure of the cut locus of a Randers rotational 2-sphere of revolution . We show that in the case when the Gaussian curvature of…

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.DG2015

The geometry of a Randers rotational surface

Pakkinee Chitsakul, Rattanasak Hama, Sorin V. Sabau

We study the behavior of geodesics on a Randers surface of revolution. The main tool is the extension of Clairaut relation from Riemannian case to the Randers case. Moreover, we sh…