Siegmund Dieter Puppe (16 December 1930 – 13 August 2005[1]) was a German mathematician who worked in algebraic topology, differential topology and homological algebra.
In 1954 he received his doctorate under Herbert Seifert (On the homotopy of images of a polyhedron.
In 1968 he returned to Heidelberg, where he stayed until his retirement in 1996, apart from guest stays at the Institute for Advanced Study in Princeton in 1957/58, in Chicago in 1961, and in Minneapolis in 1966/67.
In 1962 he gave a lecture at the International Congress of Mathematicians in Stockholm (Korrespondenzen in abelschen Kategorien).
His students included Tammo tom Dieck, Hans-Werner Henn, and Rudolf Fritsch.