Discretized fractional substantial calculus

Discretized fractional substantial calculus
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离散分数阶微积分

DOI:
10.1051/m2an/2014037
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发表时间:
2013-10
期刊:
ESAIM: Mathematical Modelling and Numerical Analysis
影响因子:
--
通讯作者:
Deng, Weihua
Deng, Weihua
中科院分区:
其他
文献类型:
--
作者:
Chen, Minghua;Deng, Weihua

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本文讨论了分数次实积分I-s(v)f(x)= 1/Gamma(v)integral(x)(a)(x-tau)(v-1)e的性质及其数值离散化(-sigma(x-tau))f(tau)d tau,v>0,以及分数实质导数D-s(mu)f(x)= D-s(m)[I-s(v)f(x)],v = m-mu,其中D-s =偏导数/偏导数x + sigma,sigma可以是常数或与x无关的函数,比如sigma(y); m是超过mu的最小整数。利用傅里叶变换和分数阶线性多步法对方程的性质进行了分析或推导出离散格式。理论上证明了所提出的离散格式的收敛性,其截断误差为O(h(p))(p = 1,2,3,4,5).
This paper discusses the properties and the numerical discretizations of the fractional substantial integral I-s(v) f(x) = 1/Gamma(v) integral(x)(a) (x-tau)(v-1)e(-sigma(x-tau)) f(tau)d tau, v>0, and the fractional substantial derivative D-s(mu) f(x) = D-s(m) [I-s(v) f(x)], v = m - mu, where D-s = partial derivative/partial derivative x + sigma, sigma can be a constant or a function not related to x, say sigma(y); and m is the smallest integer that exceeds mu. The Fourier transform method and fractional linear multistep method are used to analyze the properties or derive the discretized schemes. And the convergences of the presented discretized schemes with the global truncation error O(h(p)) (p = 1, 2, 3, 4, 5) are theoretically proved and numerically verified.
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