Results 41 to 50 of about 2,924,633 (320)
Mathematics, 2022 Fractional Galilei invariant advection–diffusion (GIADE) equation, along with its more general version that is the GIADE equation with nonlinear source term, is discretized by coupling weighted and shifted Grünwald difference approximation formulae and ...
Farzaneh Safari +3 more
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Nonlinear approximation for perturbations inΛCDM [PDF]
, 2012 We describe inhomogeneities in a {\Lambda}CDM universe with a gradient series expansion and show that it describes the gravitational evolution far into the non-linear regime and beyond the capacity of standard perturbation theory at any order. We compare
G. Rigopoulos, W. Valkenburg
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Wavelet transform based nonlınear predıctıon of sıgnals [PDF]
Scientific Bulletin of the ''Petru Maior" University of Tîrgu Mureș, 2014 Estimating signals from time series is a common task in many domains of science and has been addressed for a long time by specialists. Predicting a signal from recorded time series remains however a very specific task, a great challenge.
Zoltan German-Sallo, Horatiu-Stefan Grif
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Nonlinear eigenvalue approximation
Numerische Mathematik, 1988 For each ? in some domainD in the complex plane, letF(?) be a linear, compact operator on a Banach spaceX and letF be holomorphic in ?. Assuming that there is a ? so thatI?F(?) is not one-to-one, we examine two local methods for approximating the nonlinear eigenvalue ?.
Smith, P.W., Moss, W.F., Ward, J.D.
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Optimal nonlinear approximation
Manuscripta Mathematica, 1989 We introduce a definition of nonlinear n-widths and then determine the n-widths of the unit ball of the Sobolev spaceW inL q.
DeVore, R., Howard, R., Micchelli, C.
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Nonlinear least squares method
Communications, 1999 The paper deals with a comparison of linear and nonlinear least squares approximation. Its aim is to show that the well known transformations of nonlinear dependencies on linear dependencies do not always give exact results.
Jaromír Máca, Bohus Leitner
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Higher order asymptotic expansions to the solutions for a nonlinear damped wave equation
, 2016 We study the Cauchy problem for a nonlinear damped wave equation. Under suitable assumptions for the nonlinearity and the initial data, we obtain the global solution which satisfies weighted $L^1$ and $L^\infty$ estimates.
Kawakami, Tatsuki, Takeda, Hiroshi
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Journal of Inequalities and Applications, 2016 In this paper, we investigate residual-based a posteriori error estimates for the hp version of the finite element approximation of nonlinear parabolic optimal control problems.
Zuliang Lu +3 more
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A two-grid finite element approximation for a nonlinear time-fractional Cable equation [PDF]
, 2015 In this article, a nonlinear fractional Cable equation is solved by a two-grid algorithm combined with finite element (FE) method. A temporal second-order fully discrete two-grid FE scheme, in which the spatial direction is approximated by two-grid FE ...
Yang Liu, Yan Du, Hong Li, Jin-feng Wang
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The Effects of Padé Numerical Integration in Simulation of Conservative Chaotic Systems
Entropy, 2019 In this paper, we consider nonlinear integration techniques, based on direct Padé approximation of the differential equation solution, and their application to conservative chaotic initial value problems.
Denis Butusov +4 more
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