On $(F,\,g,\,u,\,v,\,łambda)$-structures
On $(F,\,g,\,u,\,v,\,łambda)$-structures
Tashiro [10] has shown that hypersurfaces of an almost complex manifold carry almost contact structures.In particular, an odd-dimensional hypersphere in an evendimensional Euclidean space carries an almost contact structure.Blair, Ludden and one of the present authors [3] (see also, Ako [1], Blair and Ludden [2], Goldberg and Yano [4, 5], …