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- W1972798981 abstract "The standard Langevin equation is a first order stochastic differential equation where the driving noise term is a Brownian motion. The marginal probability density is a solution to a linear partial differential equation called the Fokker–Planck equation. If the Brownian motion is replaced by so-called α-stable noise (or Lévy noise) the Fokker–Planck equation no longer exists as a partial differential equation for the probability density because the property of finite variance is lost. Instead it has been attempted to formulate an equation for the characteristic function (the Fourier transform) corresponding to the density function. This equation is frequently called the spectral Fokker–Planck equation. This paper raises doubt about the validity of the spectral Fokker–Planck equation in its standard formulation. The equation can be solved with respect to stationary solutions in the particular case where the noise is Cauchy noise and the drift function is a polynomial that allows the existence of a stationary probability density solution. The solution shows paradoxic properties by not being unique and only in particular cases having one of its solutions closely approximating the solutions to a corresponding Langevin difference equation. Similar doubt can be traced Grigoriu's work [Stochastic Calculus (2002)]." @default.
- W1972798981 created "2016-06-24" @default.
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- W1972798981 date "2004-10-01" @default.
- W1972798981 modified "2023-09-23" @default.
- W1972798981 title "Invalidity of the spectral Fokker–Planck equation for Cauchy noise driven Langevin equation" @default.
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- W1972798981 doi "https://doi.org/10.1016/j.probengmech.2004.04.002" @default.
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