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 changes in the nature of water-borne alluvial sediments ... (Earth) [100%] 2024-01-01 [Sedimentology]
Perturbazione: Perturbazione are an Italian indie pop rock band formed in Rivoli, Italy at the end of the 1980s. In 1988, in Rivoli, Tommaso Cerasuolo (singer), Rossano Antonio Lo Mele (drums) and other two schoolmates founded the band. (Italian music group) [92%] 2024-06-23 [Italian musical groups] [Musical groups from Piedmont]...
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 which a ... (Physics) [70%] 2022-10-27 [Perturbation theory] [Quantum mechanics]...
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 which a ... (Quantum mechanics) [70%] 2023-12-29 [Perturbation theory] [Mathematical physics]...
Perturbation theory (dynamical systems): The principle of perturbation theory is to study dynamical systems that are small perturbations of `simple' systems. Here simple may refer to `linear' or `integrable' or `normal form truncation', etc. (Dynamical systems) [70%] 2021-12-24 [Bifurcations] [Celestial mechanics]...
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 step that breaks ... (Physics) [70%] 2023-12-30 [Perturbation theory] [Concepts in physics]...
Perturbation theory: A group of methods for studying various problems employed in many branches of mathematics, mechanics, physics, and technology. In this article the principal ideas of perturbation theory are given from a general point of view. (Mathematics) [70%] 2023-10-24
Eigenvalue perturbation: In mathematics, an eigenvalue perturbation problem is that of finding the eigenvectors and eigenvalues of a system A x = λ x {\displaystyle Ax=\lambda x} that is perturbed from one with known eigenvectors and eigenvalues A 0 x 0 = λ 0 x ... [70%] 2024-11-04 [Perturbation theory] [Differential calculus]...
Perturbation occidentale: modifier - modifier le code - modifier Wikidata Une perturbation occidentale est une tempête extratropicale originaire de la région méditerranéenne qui apporte des pluies hivernales soudaines dans les parties nord du sous-continent indien qui s'étend à l'est jusqu'aux parties ... [70%] 2025-01-21
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. [70%] 2025-03-06 [Linear programming] [Convex optimization]...
Perturbation singulière: En mathématiques, un problème de perturbation singulière est un problème dépendant d'un petit paramètre qui ne peut être approché en fixant ce paramètre à 0. Il ne peut donc être approché uniformément par un développement asymptotique avec ε → 0. [70%] 2025-04-04
Perturbation écologique: Pour les articles homonymes, voir Perturbation. Cet article doit être recyclé (janvier 2015). [70%] 2025-05-02
Simplified perturbations models: Simplified perturbations models are a set of five mathematical models (SGP, SGP4, SDP4, SGP8 and SDP8) used to calculate orbital state vectors of satellites and space debris relative to the Earth-centered inertial coordinate system. This set of models is ... (Astronomy) [62%] 2023-12-29 [Orbital perturbations] [Computational physics]...
Resonant magnetic perturbations: Resonant magnetic perturbations (RMPs) are a special type of magnetic field perturbations used to control burning plasma instabilities called edge-localized modes (ELMs) in magnetic fusion devices such as tokamaks. The efficiency of RMPs for controlling ELMs was first demonstrated ... (Physics) [62%] 2023-12-31 [Plasma physics] [Tokamaks]...
Kerr–Schild perturbations: Kerr–Schild perturbations are a special type of perturbation to a spacetime metric which only appear linearly in the Einstein field equations which describe general relativity. They were found by Roy Kerr and Alfred Schild in 1965. (Physics) [62%] 2024-12-24 [General relativity]
Chiral perturbation theory: Chiral perturbation theory (ChPT) is an effective field theory constructed with a Lagrangian consistent with the (approximate) chiral symmetry of quantum chromodynamics (QCD), as well as the other symmetries of parity and charge conjugation. ChPT is a theory which allows ... (Effective field theory of quantum chromodynamics) [57%] 2023-12-30 [Quantum chromodynamics]
Causal perturbation theory: Causal perturbation theory is a mathematically rigorous approach to renormalization theory, which makes it possible to put the theoretical setup of perturbative quantum field theory on a sound mathematical basis. It goes back to a seminal work by Henri Epstein ... (Mathematically rigorous approach to renormalization theory) [57%] 2023-12-29 [Renormalization group]
Chiral perturbation theory: $ \newcommand{\qbar}{\bar{q}} \newcommand{\ubar}{\bar{u}} \newcommand{\dbar}{\bar{d}} \newcommand{\sbar}{\bar{s}} \newcommand{\lvac}{\langle 0|\,} \newcommand{\rvac}{\,|0\rangle} \newcommand{\be}{\begin{equation}} \newcommand{\ee}{\end{equation}} \newcommand{\bdm}{\begin{displaymath}} \newcommand{\edm}{\end{displaymath ... [57%] 2021-12-24
Pressure perturbation calorimetry: Pressure perturbation calorimetry (PPC) is a technique closely related to isothermal titration calorimetry (ITC) and differential scanning calorimetry (DSC). In brief, PPC measures heat changes associated with dilute aqueous solutions of proteins or other biomolecules in response to introduction of ... (Physics) [57%] 2023-12-30 [Calorimetry]
Singular perturbation theory: Singular perturbation theory concerns the study of problems featuring a parameter for which the solutions of the problem at a limiting value of the parameter are different in character from the limit of the solutions of the general problem; namely ... [57%] 2021-12-24 [Dynamical Systems] [Applied Mathematics]...
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