Non-exact solutions in general relativity
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Non-exact solutions in general relativity are solutions of Albert Einstein's field equations of general relativity which hold only approximately. These solutions are typically found by treating the gravitational field, , as a background space-time, , (which is usually an exact solution) plus some small perturbation, . Then one is able to solve the Einstein field equations as a series in , dropping higher order terms for simplicity.
and dropping all terms which are of second or higher order in .
- Linearized gravity
- Post-Newtonian expansion
- Parameterized post-Newtonian formalism
- Numerical relativity
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