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I: PRELIMINARIES

1. Introduction and Overview
2. Special relativity: the basics

II: RELATIVITY - Metric Description of Spacetime

3. Special relativity: the geometric formulation
4. The principle of equivalence
5. Metric description of a curved space
6. GR as a geometric theory of gravity - I
7. Spherically symmetric spacetime - GR tests
8. Black holes

III: COSMOLOGY

9. The homogeneous and isotropic universe
10. The expanding universe and thermal relics
11. Inflation and the accelerating universe

IV: RELATIVITY - Full Tensor Formulation

12. Tensors in special relativity
13. Tensors in general relativity
14. GR as a geometric theory of gravity - II
15. Linearized theory and gravitational waves

Einstein's general theory of relativity is introduced in this advanced undergraduate and beginning graduate level textbook. Topics include special relativity, in the formalism of Minkowski's four-dimensional space-time, the principle of equivalence, Riemannian geometry and tensor analysis, Einstein field equation, as well as many modern cosmological subjects, from primordial inflation and cosmic microwave anisotropy to the dark energy that propels an accelerating universe.

The author presents the subject with an emphasis on physical examples and simple applications without the full tensor apparatus. The reader first learns how to describe curved spacetime. At this mathematically more accessible level, the reader can already study the many interesting phenomena such as gravitational lensing, precession of Mercury's perihelion, black holes, and cosmology. The full tensor formulation is presented later, when the Einstein equation is solved for a few symmetric cases. Many modern topics in cosmology are discussed in this book: from inflation, cosmic microwave anisotropy to the "dark energy" that propels an accelerating universe.

Mathematical accessibility, together with the various pedagogical devices (e.g., worked-out solutions of chapter-end problems), make it practical for interested readers to use the book to study general relativity and cosmology on their own.