Multisymplectic formulation of Yang--Mills equations and Ehresmann   connections
  We present a multisymplectic formulation of the Yang--Mills equations. The connections are represented by normalized equivariant 1-forms on the total space of a principal bundle, with values in a Lie algebra. Within the multisymplectic framework we realize that, under reasonable hypotheses, it is not necessary to assume the equivariance condition a priori, since this condition is a consequence of the dynamical equations. 
Fr\'ed\'eric H\'elein
math-ph math.DG math.MP