1 disturb in mind or make uneasy or cause to be worried or alarmed; "She was rather perturbed by the news that her father was seriously ill" [syn: unhinge, disquiet, trouble, cark, distract, disorder]
2 disturb or interfere with the usual path of an electron or atom; "The electrons were perturbed by the passing ion"
3 cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull; "The orbits of these stars were perturbed by the passings of a comet"
4 throw into great confusion or disorder; "Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt" [syn: derange, throw out of kilter]
- Rhymes: -ɜː(r)b
- To disturb; to bother or unsettle.
- To slightly modify the motion of an object.
- To modify the motion of a body by exerting a gravitational force.
- To modify slightly, such as an equation or value.
Perturbation or perturb may refer to any of numerous concepts in several fields:
- Perturbation theory, mathematical methods that give approximate solutions to problems that cannot be solved exactly
- Perturbation (geology), changes in the nature of alluvial deposits over time
- Perturbation (astronomy), alterations to an object's orbit caused by gravitational interactions with other bodies
- Perturbation theory (quantum mechanics), a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one
- Perturbation (biology), an alteration of the function of a biological system, induced by external or internal mechanisms
- Perturbation (economic), an alteration of the function of an economic system, induced by external or internal mechanisms
- Perturbation (machine learning), making changes in the dataset to (re)learn a classifier (used in bagging and boosting).
perturb in German: Perturbation
perturb in Spanish: Perturbación
perturb in French: Perturbation
perturb in Russian: Пертурбация
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