%0 Journal Article %T Special Half Lightlike Submanifolds of an Indefinite Cosymplectic Manifold %A Dae Ho Jin %J Journal of Function Spaces and Applications %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/636242 %X We study the geometry of half lightlike submanifolds of an indefinite cosymplectic manifold . First, we construct two types of half lightlike submanifolds according to the form of the structure vector field of , named by tangential and ascreen half lightlike submanifolds. Next, we characterize the lightlike geometries of such two types of half lightlike submanifolds. %U http://www.hindawi.com/journals/jfsa/2012/636242/