Retrieving "Riemann Tensor" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Angular Momentum Tensor

   Linked via "Riemann tensor"

   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…