Exterior Differential Systems
Differential systems and isometric embeddings. Annals of Mathematics Studies, 114. The William H. Roever Lectures in Geometry
Princeton University Press, 1987, xii+226 pp.
Exterior differential systems. Mathematical Sciences Research Institute Publications, 18
Springer-Verlag, New York, 1991, viii+475 pp.
Exterior differential systems and Euler-Lagrange partial differential equations
University of Chicago Press, 2003, vii+213 pp.
Deformations of G-structures, Part A: General theory of deformations
Mathematische Annalen . 155 (1964) 292-315.
On the theory of variation of structures defined by transitive, continuous pseudogroups
Osaka Journal of Mathematics . 1 (1964) 175-199.
[ onthetheory.pdf ]
Deformations of G-structures, Part B: Deformations of geometric G-structures
Mathematische Annalen. 158 (1965) 326-351.
On the existence of a locally complete germ of deformation of certain G-structures
Mathematische Annalen. 159 (1965) 151-171.
Exterior differential systems
Proceedings of the 1980 Beijing Symposium on Differential Geometry and Differential Equations. 1,2,3 (1982) 219-338 Science Press, Beijing.
[ exteriordifferential.pdf ]
Pfaffian Systems in Involution
Proceedings of the 1982 Beijing Symposium on Differential Geometry and Differential Equations. (1982)
Some aspects of exterior differential systems. Complex geometry and Lie theory
Proceedings of Symposia in Pure Mathematics, Sundance, UT,1989. 53 (1991) 151-173 Amer. Math. Soc., Providence, R.I..
Characteristic cohomology of differential systems, I. General theory
Journal of the American Mathematical Society. 8 no. 3 (1995) 507-596.
[ charcohomol.pdf ]
Characteristic cohomology of differential systems, II. Conservation laws for a class of parabolic equations
Duke Mathematical Journal. 78 (1995) 531-676.
[ charcohomol2.pdf ]
Hyperbolic exterior differential systems and their conservation laws. I.
Selecta Mathematica. New Series. 1 no. 1 (1995) 21-112.
[ hyperex1.pdf ]
Hyperbolic exterior differential systems and their conservation laws. II
Selecta Mathematica. New Series. 1 no. 2 (1995) 265-323.
[ hyperex2.pdf ]
Toward a geometry of differential equations
Geometry, Topology, & Physics, for Raoul Bott, edited by S.-T. Yau. (1995) 1-76 International Press, Boston.
Exterior differential systems and Euler-Lagrange partial differential equations(2004) Uni. Chicago Press.
Exterior differential systems and variations of Hodge structures
(presented at MSRI, April 20, 2009)
[ eds.pdf ]