Perturbation theory

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

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Notion

Domain

Science and technology

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What Wikipedia says

In mathematics, perturbation theory comprises methods for finding an approximate solution to a problem, by starting from the exact solution of a related, simpler problem. A critical feature of the technique is a middle step that breaks the problem into "solvable" and "perturbative" parts.

Excerpt from the Wikipedia article “Perturbation theory”, under the CC BY-SA 4.0 license. Read the article on Wikipedia