Astronomische Nachrichten · 1994 · 12 citations · 3 references
Natural SciencesPhysicsCosmologyRelativityTheoretical PhysicsEinstein Field EquationsGauge TheoryGeneral RelativityHamiltonian MechanicsLagrangian DynamicsSpacetime GeometryCanonical CoordinatesEinstein Field Equations In CosmologyEnergy-momentum Tensor Of The Electromagnetic FieldGeneral Relativity In CosmologyHamiltonian FormulationHamiltonian Formulation Of General RelativityLevi-civita ConnectionTransposition Invariance
Abstract The Lagrangian of the general‐relativistic affine field theory of the non‐symmetric connection field Γ i kl is Schrödinger scalar density \documentclass{article}\pagestyle{empty}\begin{document}$ H = \frac{2}{\lambda }\sqrt { - \det [R} _{ik} ] $\end{document} , and the field variables (canonical coordinates) are Einstein's affine tensors U mn l = Γ l mn ‐ δ n l Γ r mn . The field equations are the Einstein‐Schrödinger equations The minors give by definiton g mn = λ −1 R mn , and λ becomes the cosmological constant. The Hamiltonian density is the V 0 0 ‐component of the Einstein energy‐momentum complex and the tensor‐density components are the canonically conjugated momentum densities of the field coordinates U l mn . The canonical equations are , and we have no constraints. The affine field theory is invariant with respect to all transformations which preserve the Levi‐Civita parallelism (Einstein's unified T‐A group), and the field equations possess transposition invariance: With Ũ l mn = U l nm we get R̃ mn = R nm , g̃ mn = g nm , and Ñ mn l = U nm l . The symmetry conditions Γ i mn = Γ i nm reduce the space to the general‐relativistic Einstein spaces with R ik = R ki . The equation R ik = λ g ik yields Γ i kl = { i kl }, and the pathes of test particles define geodesic world lines of the Einstein spaces.
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Introduction to the Theory of Relativity
The Australasian Journal of Optometry · 1920 · 528 citations
A. Lemaître · General Relativity and Gravitation · 1997 · 469 citations
George Ellis, Roy Maartens, S D Nel · Monthly Notices of the Royal Astronomical Society · 1978 · 99 citations · Full text