%0 Journal Article %T On Special Generalized Douglas-Weyl Metrics %J Journal of Sciences, Islamic Republic of Iran %I University of Tehran %Z 1016-1104 %A Peyghan, E. %D 2012 %\ 06/01/2012 %V 23 %N 2 %P 179-184 %! On Special Generalized Douglas-Weyl Metrics %K Douglas space %K The non-Riemannian quantity H %K Landsberg metric %R %X In this paper, we study a special class of generalized Douglas-Weyl metrics whose Douglas curvature is constant along any Finslerian geodesic. We prove that for every Landsberg metric in this class of Finsler metrics, ? = 0 if and only if H = 0. Then we show that every Finsler metric of non-zero isotropic flag curvature in this class of metrics is a Riemannian if and only if ? = 0. %U https://jsciences.ut.ac.ir/article_25071_4c5a912dadf3aac1e5754e7de349b86c.pdf