Topics in Geometry

This collection of articles serves to commemorate the legacy of Joseph D''Atri, who passed away on April 29, 1993, a few days after his 55th birthday. Joe D'' Atri is credited with several fundamental discoveries in ge­ ometry. In the beginning of his mathematical career, Joe was interested in the generalization of symmetrical spaces in the E. Cart an sense. Symmetric spaces, differentiated from o...