3 papers
math.DG2019
Finsler metrics that are both Douglas and generalized Berwald in dimension two
Nina Bartelmeß, Julius Lang
We proof that in dimension two, a Finsler metric is Douglas and generalized Berwald, if and only if it is Berwald or a Randers metric , where is closed and is of constant…
math.DG2019
Projectively equivalent Finsler metrics on surfaces of negative Euler characteristic
Julius Lang
We proof that on a surface of negative Euler characteristic, two real-analytic Finsler metrics have the same unparametrized oriented geodesics, if and only if they differ by a scal…
math.DG2019
Finsler metrics on surfaces admitting three projective vector fields
Julius Lang
We show that in dimension 2 every Finsler metric with at least 3-dimensional Lie algebra of projective vector fields is locally projectively equivalent to a Randers metric. We give…