Differential geometry and mathematical physics : lectures given at the meetings of the Belgian Contact Group on Differential Geometry held at Liège, May 2-3, 1980 and at Leuven, February 6-8, 1981 / edited by M. Cahen ... [et al.]. Cahen, M. (Michel), 1935- Belgian Contact Group on Differential Geometry. Geometry, Differential. Mathematical physics. QC20.7.D52 D538 1983 516.36 19 DIF Includes bibliographical references and index. Dordrecht, Holland ; Boston, U.S.A. : D. Reidel Pub. Co. ; Hingham, MA : c1983. c1983. 1983 Text vii, 188 p. : eng Mathematical physics studies ; v. 3