Questions for the exam
- Cartan's formalism of representation-valued forms: tensors,
tensor densities, pseudotensors. Examples of tensor-valued forms
appearing in General Relativity.
- Covariant differentiation. Linear connections. Torsion and
curvature.
- Covariant differential. Ricci formula.
- Bianchi identities.
- Koszul notation and his axioms for the connections. Torsion and
curvature in this language.
- Parallel transport and selfparallels.
- Geodesics. Christoffel symbols. Levi-Civita connection.
- Determination of a connection in terms of its torsion and
nonmetricity.
- Riemann tensor and its symmetries.
- Vanishing of the Riemann tensor. Local form of the metric having
vanishing Riemann tensor.
- Decomposition of the Riemann tensor: the Weyl, the Schouten and the Ricci
tensors. Ricci scalar. The numbers of independent components for
these objects.
- Contracted Bianchi identities. The Einstein tensor.
- Formulation of General Relativity. The minimal coupling principle and
the Newtonian limit of equations of motion for a free particle.
- Einstein's field equations and the Einstein Universe.
- Linearization of Einstein's equations.
- Determination of the universal constant on the right hand side of
Einstein's equations from the Newtonian limit.
- Tidal forces and the Jacobi equation.
- Gravitational waves in linearized theory. Evolution of a ball
of dust in the field of a monochromatic gravitational wave.
- Killing fields and the Killing equation. Maximal group of
symmetries and the spaces of constant curvature. DeSitter and
anti-DeSitter spaces.
- Stationary, static and spherically symmetric gravitational
fields. The most general form of a spherically symmetric Lorentzian
4-metric.
- Spherically symmetric gravitational fields in vacuum. The
Schwarzschild metric.
- Maximal analytic extension of the Schwarzschild metric. The
Kruskal diagram.
- Radial free fall in the Schwarzschild spacetime.
- Equations of motion of a test particle in the Schwarzschild spacetime.
- Perihelion advance of planets orbiting around Schwarzschild black
hole.
- Deflection of light near a Schwarzschild black hole.
- Mathematical formulation of spatial homogeneity. Bianchi models.
- Mathematical fomulation of spatial isotropy. Robertson-Walker
metric.
- Friedman-Lemaitre-Robertson-Walker cosmologies. Friedman
equations with and without cosmological constant. Discussion of
solutions. Possible topologies.
- Measurable cosmological parameters: the Hubble constant and Omega.