“{PDF} Differential Geometric Methods in Mathematical Physics: Clausthal 1980 Proceedings of an International Conference Held at the Technical University of Clausthal, FRG, July 23 ? 25, 1980 I. E. Segal (auth.), Heinz-Dietrich Doebner, Stig I. Andersson, Herbert Rainer Petry (eds.)” has been added to your cart. View cart