I would like to hear an original explanation of gauge symmetry. What gauge symmetry really means and why it is needed to describe nature.(adsbygoogle = window.adsbygoogle || []).push({});

I am more or less familiar with the standard treatment of electromagnetism and Yang Mills theories from QFT texts, but feel still unsatisfied since I have not grasped what goes on 'behind the equations', what it all really means.

So could you give me some real and deep insight on what is meant by gauge symmetry?

thank you

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# Gauge symmetry

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