perturbation theory

noun

A mathematical technique for finding an approximate solution to a problem that cannot be solved exactly, by starting from the exact solution of a related problem; used in modelling physical interactions between particles, etc.

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Meanings

nounperturbation theory (uncountable)
  1. uncountableA mathematical technique for finding an approximate solution to a problem that cannot be solved exactly, by starting from the exact solution of a related problem; used in modelling physical interactions between particles, etc.

Translations

German Störungstheorie
  • Störungstheoriemathematical technique
Cite this entry
APA

perturbation theory. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/perturbation%20theory

MLA

“perturbation theory.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/perturbation%20theory. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “perturbation theory,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/perturbation%20theory.

Source: perturbation theory on Wiktionary, CC BY-SA 4.0.