Submitted by admin on Tue, 2010-11-02 16:08 Author: Phillip A. GriffithsLast Name: GriffithsJournalJournal: Jahrbuch / Akademie der Wissenschaften in Gottingen, Vandenhoeck & Ruprecht in Gottingen Year: 1979 Type: article IAS: Phillip A. GriffithsSchool of Mathematics: Math