Template-Type: ReDIF-Paper 1.0 Title: Best approximate solutions to matrix equations under rank restrictions Author-Name: Sondermann,Dieter Author-WorkPlace-Name: University of Bonn Classification-JEL: 213,211 Keywords: Penrose concept,Matrix equations,Rank restrictions Series: Sonderforschungsbereich 303 Creation-Date: 1985-10 Handle: RePEc:bon:bonsfb:6