In mathematics and applied mathematics, perturbation theory comprises methods for finding an approximate solution to a problem, by starting from the exact...
22 KB (2,938 words) - 15:24, 18 July 2024
In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated...
70 KB (15,963 words) - 03:05, 20 July 2024
Møller–Plesset perturbation theory (MP) is one of several quantum chemistry post-Hartree–Fock ab initio methods in the field of computational chemistry...
23 KB (2,870 words) - 20:17, 25 November 2023
cosmological perturbation theory is the theory by which the evolution of structure is understood in the Big Bang model. Cosmological perturbation theory may be...
15 KB (2,050 words) - 13:23, 28 October 2023
Chiral perturbation theory (ChPT) is an effective field theory constructed with a Lagrangian consistent with the (approximate) chiral symmetry of quantum...
10 KB (1,506 words) - 18:11, 25 July 2023
represented by a Feynman diagram according to perturbation theory in quantum mechanics. Quantum field theory emerged from the work of generations of theoretical...
106 KB (14,897 words) - 08:50, 30 July 2024
In mathematics, variational perturbation theory (VPT) is a mathematical method to convert divergent power series in a small expansion parameter, say s...
4 KB (428 words) - 13:36, 16 December 2020
Frontier molecular orbital theory Ligand field theory (MO theory for transition metal complexes) Møller–Plesset perturbation theory Quantum chemistry computer...
22 KB (2,943 words) - 17:32, 23 June 2024
Look up perturbation or perturb in Wiktionary, the free dictionary. Perturbation or perturb may refer to: Perturbation theory, mathematical methods that...
952 bytes (149 words) - 10:41, 23 May 2018
straightforwardly defined using the techniques of perturbation theory, but it is not known in general how to define string theory nonperturbatively. It is also not clear...
123 KB (15,355 words) - 03:08, 13 August 2024