Siegmund Dieter Puppe (1930-2005) was a German mathematician who made important contributions to algebraic topology and homotopy theory in particular. He held a chair at Heidelberg University from 1968 until his retirement in 1996. Among other publications he notably published in 1966 together with H.-B. Brinkmann Kategorien und Funktoren , the first German language textbook on category theory.
D. Puppe, Korrespondenzen in abelschen Kategorien , Math. Ann. 148 (1962) pp.1-30. (gdz)