Exterior Differential Systems

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 ]
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.