NASA NTRS · 19830009122
Spin and gravitation
Abstract
The fundamental variational principle for a perfect fluid in general relativity is extended so that it applies to the metric-torsion Einstein-Cartan theory. Field equations for a perfect fluid in the Einstein-Cartan theory are deduced. In addition, the equations of motion for a fluid with intrinsic spin in general relativity are deduced from a special relativistic variational principle. The theory is a direct extension of the theory of nonspinning fluids in special relativity.
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Ray, J. R.. 1982-08-01. Spin and gravitation. https://ntrs.nasa.gov/citations/19830009122
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