| 1. | Nontrivial examples include the Schwarzschild solution and the Kerr solution.
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| 2. | The Schwarzschild solution is only valid outside such a body.
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| 3. | The de Sitter Schwarzschild solution is the simplest solution which has both.
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| 4. | Superposing the two solutions gives the de Sitter Schwarzschild solution:
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| 5. | For more information, see Deriving the Schwarzschild solution.
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| 6. | The well-known Schwarzschild Solution describes the geometry around a spherical star.
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| 7. | The Schwarzschild solution can be written as
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| 8. | Indeed, the Schwarzschild solution for negative mass parameter has a naked singularity at a fixed spatial position.
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| 9. | Examples of important exact solutions include the Schwarzschild solution and the Friedman-Lema�tre-Robertson Walker solution.
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| 10. | A fourth paper is devoted to the cancellation of the Schwarzschild solution, questioning the classical black hole model.
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