Subject: answer to Jim Stasheff question Date: Wed, 10 Oct 2001 11:08:17 +0200 From: Max Karoubi To: Don Davis > > >Subject: query >Date: Tue, 9 Oct 2001 14:00:39 -0400 (EDT) >From: James Stasheff > >Has there been any work on the obstructions to existence >or classification of spinor bundles of general signature (p,q)? >in particular (n,n)? > >thanks > > Jim Stasheff jds@math.upenn.edu > > Home page: www.math.unc.edu/Faculty/jds The obstruction to the existence of Spin(p,q) structures has been computed in my thesis (chapter 1), with the following title and reference : Algebres de Clifford et K-theorie . Ann. Sci. Ec. Norm. Sup., p. 161-270 (1968). Max Karoubi -- ____________________________________________________ Max KAROUBI Universite Paris 7- Mathematiques - Case 7012 175/179 rue du Chevaleret (bureau 9D1) 75013 PARIS - FRANCE Tel. : 01-4427-7953, FAX : 01-4427-6366 ; Secr. 01-4427-6932 From abroad : replace 01 by 331 http://www.math.jussieu.fr/~karoubi/ _____________________________________________________