with Phillip Griffiths and Dan Grossmann, Exterior Differential Systems and Euler-Lagrange Partial Differential Equations, Chicago Lectures in Mathematics
(2003), University of Chicago Press (vii+213 pages, ISBN: 0-226-07794-2.)
(last updated on 2004/07/24)
Author's Comments:
This is a book of approximately 160 pages that covers
the work that Phillip Griffiths and I have been doing in
the geometry of the calculus of variations for the last
several years.