perturbation theory in a sentence

Examples

1. The MP perturbation theory is a special case of RS perturbation theory.
2. Perturbation theory fails for electron liquids where r _ s > 1.
3. The higher-order corrections can be obtained by conventional perturbation theory.
4. The perturbation theory in Feynman diagrams is the same way.
5. This allowed him to rewrite perturbation theory precisely in the form of diagrams.
6. This effect could not be seen in any finite order in perturbation theory.
7. This phenomenon can be explained using cavity perturbation theory.
8. Slight deviations from the Gaussian fixed point can be described by perturbation theory.
9. There are currently two distinct approaches to perturbation theory in classical general relativity:
10. In perturbation theory, forces are generated by the exchange of virtual particles.