
 Nonlinear Hodge Theory (Site not responding. Last check: 20071018) 
  Nonlinear Hodge theory introduces a quasilinear extension of the HodgeKodaira equations and can be used, for instance, to model the stationary flow of a compressible fluid, codimension1 nonparametric minimal surfaces, the rotation of a nonrigid body, torsion in a rod, or capillary action. 
  In all cases the potential is represented by a 0form and the field by a dclosed 1form, where d is the (flat) exterior derivative [SS]. 
  In this extension the role played by dclosed 1forms in nonlinear Hodge theory is played by Dclosed 2forms, where D is the exterior covariant derivative. 
 www.yu.edu /faculty/otway/Nonlinear.htm (444 words) 
