Zhangwen Guo

Two Fefferman-Type Constructions Involving Almost Grassmann Structures and Path Geometries

Abstract We introduce a Fefferman-type construction that associates an almost Grassmann structure of type $$(2,n+1)$$ ( 2 , n + 1 ) to every $$(n+1)$$ ( n + 1 ) -dimensional path geometry. We prove that the construction is normal and provide two equivalent characterizing conditio...