Summary
The metric tensor for one of the simplest cases is calculated in the Finsler geometry. For the spherically symmetric-coordinate system, it is assumed that effective components of differential variables are for time and radial directions. And a solution corresponding to the Friedmann solution in the Riemann space is discussed.
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References
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Matono, T. A solution in the finsler geometry. Nuov Cim B 108, 343–349 (1993). https://doi.org/10.1007/BF02887494
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DOI: https://doi.org/10.1007/BF02887494