In the yang Mils formulation of the EM field (Faraday Maxwell) tensor, what exactly is (means) the complementary term usually written: [A., A.] (see for example the article of Jackiw: 50 years of the Yang Mils theory and my contribution to it) and related to the fact that this theory can be non Abelian? Thanks for your help(adsbygoogle = window.adsbygoogle || []).push({});

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# Yang Mils: easy question

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