Perturbation theory refers to a method used in science and mathematics to understand complex systems by breaking them down into simpler, more manageable parts. It helps us calculate and predict the behavior of these systems by analyzing how they change when subjected to small disruptions or "perturbations."
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To do so, Laplace pioneered a new kind of mathematics
called perturbation theory, which enabled him to examine the cuumulative effects of many small forces.
In a paper accepted for publication by Physical Review Letters, the researchers used a technique familiar to physicists called «
degenerate perturbation theory» in a novel way to prove that global symmetry is not required for a sped up search.
While teaching a Caltech course on planetary physics, Batygin (the theorist behind the proposed existence of Planet Nine) turned to an approximation scheme
called perturbation theory to formulate a simple mathematical representation of disk evolution.
The site's creator, John M. Pierre, starts by explaining how string theory relates to the Standard Model and then lays out the basicsfrom open and closed strings to
perturbation theory.