👉 Perturbatively, a mathematical concept that involves the use of calculus to study the behavior of functions at certain points in their domain. This is particularly useful when dealing with problems involving oscillations or waves, where the behavior of solutions can be difficult to predict without using more advanced techniques such as Fourier analysis. Perturbatively defined functions are those whose derivatives behave like polynomials and are therefore easier to work with than standard functions.
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What is the definition of Perturbative? 🙋
👉 Perturbation theory is a branch of quantum mechanics that deals with the effects of small changes in physical quantities, such as the size or shape of a quantum system. Perturbations are tiny variations in the configuration of particles and fields within the system, which can cause significant deviations from the predictions of classical physics. In perturbation theory, one studies the behavior of a system under perturbative corrections to its initial conditions. This means that the system is allowed to evolve for long periods of time,
