Perturbation or perturb may refer to:
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Perturbation theory
In mathematics and applied 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 ...
, mathematical methods that give approximate solutions to problems that cannot be solved exactly
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Perturbation (geology)
Perturbation (from Latin: ''perturbare'' "to confuse, disorder, disturb", from ''per''- "through" + ''turbare'' "disturb, confuse," from ''turba'' "turmoil, crowd") is a set of pedology (soil study) and sedimentary geology processes relating to ch ...
, changes in the nature of alluvial deposits over time
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Perturbation (astronomy)
In astronomy, perturbation is the complex motion of a massive body subjected to forces other than the gravitational attraction of a single other massive body. The other forces can include a third (fourth, fifth, etc.) body, resistance, as from ...
, alterations to an object's orbit (e.g., caused by gravitational interactions with other bodies)
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Perturbation theory (quantum mechanics)
In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one. The idea is to start with a simple system for whic ...
, a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one
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Perturbation (biology)
In ecology, a disturbance is a temporary change in environmental conditions that causes a pronounced change in an ecosystem. Disturbances often act quickly and with great effect, to alter the physical structure or arrangement of biotic and abiotic ...
, an alteration of the function of a biological system, induced by external or internal mechanisms
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Perturbation function In mathematical optimization, the perturbation function is any function which relates to primal and dual problems. The name comes from the fact that any such function defines a perturbation of the initial problem. In many cases this takes the form ...
, mathematical function which relates the primal and dual problems
See also
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Annoy
Annoyance is an unpleasant mental state that is characterized by irritation and distraction from one's conscious thinking. It can lead to emotions such as frustration and anger. The property of being easily annoyed is called irritability.
P ...
,
annoyance
Annoyance is an unpleasant mental state that is characterized by irritation and distraction from one's conscious thinking. It can lead to emotions such as frustration and anger. The property of being easily annoyed is called irritability.
Ps ...
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Disturbance (disambiguation)
Disturbance and its variants may refer to:
Math and science
* Disturbance (ecology), a temporary change in average environmental conditions that causes a pronounced change in an ecosystem
* Disturbance (geology), linear zone of faults and folds ...
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Non-perturbative
In mathematics and physics, a non-perturbative function or process is one that cannot be described by perturbation theory. An example is the function
: f(x) = e^,
which does not have a Taylor series at ''x'' = 0. Every coefficient of the Taylor ...
{{disambiguation