General Relativity

Einstein's Masterpiece: Gravity is the curvature of spacetime. Mass-energy tells spacetime how to curve, and spacetime tells mass-energy how to move.

General Relativity Solutions & Resources

Solutions to exercises from "Spacetime and Geometry" by Sean Carroll and comprehensive video tutorials

About These Resources

General Relativity requires mastering differential geometry before tackling Einstein's field equations. These resources provide step-by-step solutions and video explanations to help you build intuition and mathematical fluency.

Carroll Textbook

The standard graduate GR text

Eigenchris Videos

Best tensor tutorials online

Worked Solutions

Exercise-by-exercise help

Eigenchris Video Series

The most highly recommended YouTube series for learning tensor calculus and general relativity. Eigenchris provides crystal-clear explanations that don't skip steps.

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Tensors for Beginners

Start here if you're new to tensors. Covers vectors, covectors, tensor transformation laws, and index notation with excellent visual intuition.

Vectors & CovectorsTensor ProductsIndex NotationTransformation Laws
Watch Playlist (27 videos)
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Tensor Calculus

Christoffel symbols, covariant derivatives, parallel transport, geodesics, and curvature tensors. Essential mathematics for GR.

Christoffel SymbolsCovariant DerivativeGeodesicsRiemann Tensor
Watch Playlist (25 videos)
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Relativity

From special relativity through Einstein's field equations. Covers the equivalence principle, stress-energy tensor, and Schwarzschild solution.

Equivalence PrincipleEinstein EquationsSchwarzschildBlack Holes
Eigenchris Channel

Carroll Textbook Solutions

Worked solutions to exercises from Sean Carroll's "Spacetime and Geometry: An Introduction to General Relativity".

General-Relativity.net

Comprehensive solutions organized by chapter, covering topics from tensor algebra through gravitational waves.

  • • Chapter 1: Special Relativity
  • • Chapter 2: Manifolds
  • • Chapter 3: Curvature
  • • Chapter 4: Gravitation
  • • And more...
View Solutions

Carroll's Lecture Notes

Sean Carroll's original lecture notes from MIT's 8.962 course - the foundation for his textbook. Free PDF.

  • • 238 pages of comprehensive notes
  • • Worked examples throughout
  • • "No-Nonsense Intro" (24 pages) also available
Download Notes

Problem Book in Relativity

Classic collection by Lightman, Press, Price, and Teukolsky with fully worked solutions.

  • • 500+ problems with full solutions
  • • Princeton University Press
  • • Covers all areas of GR
View Book

UC Santa Cruz Problem Sets

Complete homework sets with solutions from Physics 226, using Carroll's textbook.

  • • Problem sets 1-9
  • • Full solution sets provided
  • • Graduate level
View Problem Sets

Key Problem Topics

Differential Geometry

  • • Metric tensor calculations
  • • Christoffel symbol computation
  • • Riemann tensor components
  • • Geodesic equations

Einstein's Equations

  • • Stress-energy tensor
  • • Weak field approximation
  • • Newtonian limit recovery
  • • Linearized gravity

Exact Solutions

  • • Schwarzschild metric
  • • Kerr black holes
  • • FLRW cosmology
  • • Gravitational waves

Essential Formulas

Einstein Field Equations

$G_{\mu\nu} + \Lambda g_{\mu\nu} = \frac{8\pi G}{c^4} T_{\mu\nu}$

Relates spacetime curvature to matter/energy content

Christoffel Symbols

$\Gamma^\lambda_{\mu\nu} = \frac{1}{2}g^{\lambda\sigma}(\partial_\mu g_{\nu\sigma} + \partial_\nu g_{\mu\sigma} - \partial_\sigma g_{\mu\nu})$

Connection coefficients from the metric

Riemann Tensor

$R^\rho_{\sigma\mu\nu} = \partial_\mu\Gamma^\rho_{\nu\sigma} - \partial_\nu\Gamma^\rho_{\mu\sigma} + \Gamma^\rho_{\mu\lambda}\Gamma^\lambda_{\nu\sigma} - \Gamma^\rho_{\nu\lambda}\Gamma^\lambda_{\mu\sigma}$

Measures intrinsic curvature of spacetime

Geodesic Equation

$\frac{d^2x^\mu}{d\tau^2} + \Gamma^\mu_{\alpha\beta}\frac{dx^\alpha}{d\tau}\frac{dx^\beta}{d\tau} = 0$

Equation of motion for free particles

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