Perturbation theory



perturbation theory
A set of mathematical methods for obtaining approximate solutions to complex equations for which no exact solution is possible or known, generally involving an iterative algorithm in which each new term contributing to the solution has less significance than the last. In quantum physics, Feynman diagrams are used to calculate the terms for the perturbation theory solution of interactions between particles.

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  • Perturbative

    [pur-ter-bey-tiv, per-tur-buh-tiv] /ˈpɜr tərˌbeɪ tɪv, pərˈtɜr bə tɪv/ adjective 1. having a tendency to perturb; disturbing.

  • Perturbator

    [per-turb] /pərˈtɜrb/ verb (used with object) 1. to disturb or disquiet greatly in mind; agitate. 2. to throw into great disorder; derange. 3. Astronomy. to cause in the orbit of (a celestial body). /pəˈtɜːb/ verb (transitive; often passive) 1. to disturb the composure of; trouble 2. to throw into disorder 3. (physics, astronomy) to cause […]



  • Perturbed

    [per-turb] /pərˈtɜrb/ verb (used with object) 1. to disturb or disquiet greatly in mind; agitate. 2. to throw into great disorder; derange. 3. Astronomy. to cause in the orbit of (a celestial body). /pəˈtɜːb/ verb (transitive; often passive) 1. to disturb the composure of; trouble 2. to throw into disorder 3. (physics, astronomy) to cause […]

  • Perturbedly

    [per-turb] /pərˈtɜrb/ verb (used with object) 1. to disturb or disquiet greatly in mind; agitate. 2. to throw into great disorder; derange. 3. Astronomy. to cause in the orbit of (a celestial body). /pəˈtɜːb/ verb (transitive; often passive) 1. to disturb the composure of; trouble 2. to throw into disorder 3. (physics, astronomy) to cause […]



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