A new proof of Szabó's theorem on the Riemann-metrizability of Berwald manifolds.
On Berwald and Wagner manifolds.
A new look at Finsler connections and special Finsler manifolds.
On compatible linear connections of two-dimensional generalized Berwald manifolds: a classical approach
In the paper we characterize the two-dimensional generalized Berwald manifolds in terms of the classical setting of Finsler surfaces (Berwald frame, main scalar etc.). As an application we prove that if a Landsberg surface is a generalized Berwald manifold then it must be a Berwald manifold. Especially, we reproduce Wagner's original result in honor of the 75th anniversary of publishing his pioneering work about generalized Berwald manifolds.
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