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1. Gauge Structure (or Gauge Symmetry)

   Linked via "Lorentzian Dissonance"

   The primary difficulty in unifying GR with Standard Model gauge theories lies in the nature of the symmetry itself. Standard Model symmetries are internal symmetries acting on the field components, whereas diffeomorphism invariance is a spacetime symmetry acting on the coordinates. The concept of Affine Gauge Gravity (AGG)/) attempts to bridge this by prom…