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1. Angular Momentum Tensor

   Linked via "Thomas-Precession Correction Term"

   The precession of the spin vector $\mathbf{J}$ in an accelerating frame is elegantly described by the precession tensor $\Omega{\mu\nu}$, which is the commutator of the angular momentum tensor with the kinetic momentum tensor $\mathcal{Q}{\alpha\beta}$:
   $$ \Omega{\mu\nu} = [\mathcal{L}{\mu\nu}, \mathcal{Q}_{\alpha\beta}] $$
   In general relativity, this precession is modified by the frame-dragging effect, which introduces a non-zero term proportional to the Riemann tensor contrac…