On Constraint Preservation in Numerical Simulations of Yang-Mills Equations.

Snorre H. Christiansen Ragnar Winther On Constraint Preservation in Numerical Simulations of Yang-Mills Equations. 75-101 2006 28 SIAM J. Scientific Computing 1 http://dx.doi.org/10.1137/040616887 db/journals/siamsc/siamsc28.html#ChristiansenW06