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Numerical experiments indicate that simply restricting the variational formulation to the Galerkin spaces yields substantial drift in the charge, contrary to the linear Maxwell case. We then propose a fully discrete method constrained with Lagrange multipliers, for which weprove discrete charge conservation and observe excellent energy conservation.<\/jats:p>","DOI":"10.1137\/040616887","type":"journal-article","created":{"date-parts":[[2006,3,15]],"date-time":"2006-03-15T21:00:21Z","timestamp":1142456421000},"page":"75-101","source":"Crossref","is-referenced-by-count":12,"title":["On Constraint Preservation in Numerical Simulations of Yang--Mills Equations"],"prefix":"10.1137","volume":"28","author":[{"given":"Snorre H.","family":"Christiansen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ragnar","family":"Winther","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"351","published-online":{"date-parts":[[2006,7,25]]},"reference":[{"key":"R1","unstructured":"D. N. 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