Quiz: why is this the case? QM and electromagnetism share it!https://twitter.com/InertialObservr/status/1184161563113967616 …
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It doesn’t help that SU(n) is a group of unitary matrices which is hard to not be linear (at least in one sense)
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i mean .. the matrix group is by definition a linear representation ..
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i'm confused .. the gauge fields are vector fields at least infinitesimally what's nonlinear about Aμ + Bμ?
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