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非線性分?jǐn)?shù)階微分方程的hp 型Legendre 譜配置法

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摘要:研究了求解非線性分?jǐn)?shù)階微分方程的 hp 型 Legendre 譜配置法。首先提出將多分?jǐn)?shù)階微分方程轉(zhuǎn)化成等價(jià)的 Volterra 積分方程, 其次構(gòu)造了近似求解原方程的數(shù)值方法, 最后通過(guò)數(shù)值實(shí)驗(yàn)說(shuō)明了該算法的理論正確性以及所構(gòu)造數(shù)值方法的有效性。

關(guān)鍵詞:非線性分?jǐn)?shù)階微分方程;Legendre 譜配置法;hp 型誤差界

中圖分類(lèi)號(hào):O 175            文獻(xiàn)標(biāo)志碼:A

An hp-version Legendre spectral collocation method for nonlinear fractional differential equations

LI Shan,  AN Xiao,  SUN Guilei

(College of Science, University of Shanghaifor Science and Technology, Shanghai 200093, China)

Abstract: The  hp-version  Legendre  spectral  collocation  method  for  solving  nonlinear  fractionaldifferential equations was studied. At first, the multifractional differential equation was transformed intoan equivalent Volterra integral equation. Then a numerical method to approximate the original equationwas constructed. Finally, the correctness of the algorithm theory and the effectiveness of the proposednumerical method were demonstrated by numerical experiments.

Keywords: nonlinear fractional differential equations; Legendre spectral collocation method; hpversion error bounds

1 問(wèn)題的提出

分?jǐn)?shù)階微分方程最重要的是非局部性質(zhì), 它能有效地避免整數(shù)階導(dǎo)數(shù)的局部性, 所以,分?jǐn)?shù)階導(dǎo)數(shù)可以更加精確地描述對(duì)歷史有依賴的問(wèn)題。(剩余5213字)

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