nonintegrable equation

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• Integrable system — In mathematics and physics, there are various distinct notions that are referred to under the name of integrable systems. In the general theory of differential systems, there is Frobenius integrability, which refers to overdetermined systems. In… …   Wikipedia

• Landau–Lifshitz model — In solid state physics, the Landau Lifshitz equation (LLE), named for Lev Landau and Evgeny Lifshitz, is a partial differential equations describing time evolution of magnetism in solids, depending on 1 time variable and 1, 2, or 3 space… …   Wikipedia

• Heisenberg model (classical) — The Heisenberg model is the n = 3 case of the n vector model, one of the models used in statistical physics to model ferromagnetism, and other phenomena.It can be formulated as follows: take a d dimensional lattice, and a set of spins of the unit …   Wikipedia

• Classical Heisenberg model — The Classical Heisenberg model is the n = 3 case of the n vector model, one of the models used in statistical physics to model ferromagnetism, and other phenomena. Contents 1 Definition 2 Properties 3 See also …   Wikipedia