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 On the special Finsler metric Bull. Korean Math. Soc. 2003 Vol. 40, No. 3, 457-464 Published online September 1, 2003 Nany Lee The University of Seoul Abstract : Given a Riemannian manifold $(M,\alpha )$ with an almost Hermitian structure $f$ and a non-vanishing covariant vector field $b\,,$ consider the generalized Randers metric $L=\alpha +\beta \,,$ where $\beta$ is a special singular Riemannian metric defined by $b$ and $f$. This metric $L$ is called an $(a,b,f)$-metric. We compute the inverse and the determinant of the fundamental tensor $(g_{ij})$ of an $(a,b,f)$-metric. Then we determine the maximal domain $\mathcal{D}\,$ of $TM\setminus O\,$ for an $(a,b,f)$-manifold where a $y$-local Finsler structure $L\,$ is defined. And then we show that any $(a,b,f)$-manifold is quasi-C-reducible and find a condition under which an $(a,b,f)$-manifold is C-reducible. Keywords : Finsler metric, generalized Randers metric, $(a,b,f)$-metric, Rizza manifold, C-reducible MSC numbers : Primary 53B40; Secondary 53C60, 58B20 Downloads: Full-text PDF