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arXiv 2104.01500math.AP
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高阶空间分数阶Dirac方程的基本解

On Fundamental Solutions of Higher-Order Space-Fractional Dirac equations

Nelson Faustino

摘要:

本文从Dirac算子$\displaystyle \mathbf{D}=\sum_{j=1}^n\mathbf{e}_j\partial_{x_j}$关于$1$阶分数算子$(-Δ)^{\frac{1}{2}}$和Riesz-Hilbert型算子$\mathcal{H}$的伪微分分解$\mathbf{D}=(-Δ)^{\frac{1}{2}}\mathcal{H}$出发,研究了含有$α$阶分数Laplacian算子$-(-Δ)^{\fracα{2}}$的Lévy-Feller型$$\partial_tΦ_α(\mathbf{x},t;θ)=-(-Δ)^{\fracα{2}}\exp\left( \frac{iπθ}{2} \mathcal{H}\right)Φ_α(\mathbb{x},t;θ) $$空间分数Dirac方程的基本解,其中$2m\leq α<2m+2$($m\in \mathbb{N}$),以及作为携带\textit{skewness parameter} $θ$的分数Riesz-Hilbert变换的超复数对应物的取幂运算符$\exp\left( \frac{iπθ}{2} \mathcal{H}\right)$,其值在范围$|θ|\leq \min\{α-2m,2m+2-α\}$中。这样的模型问题使我们能够得到高阶热型方程$\partial_t F_M(x,t)=κ_M(\partial_x)^M F_M(x,t)$ $(M=2,3,\ldots)$的基本解的超复对应,当方程的偶数次幂分别为奇次幂$\mathbf{D}^{2m}=(-Δ)^{m}$($M=α=2m$)正在考虑$\mathbf{D}$的$\mathbf{D}^{2m+1}=(-Δ)^{m+\frac{1}{2}}\mathcal{H}$($M=α=2m+1$)。

英文摘要:

Starting from the pseudo-differential decomposition $\mathbf{D}=(-Δ)^{\frac{1}{2}}\mathcal{H}$ of the Dirac operator $\displaystyle \mathbf{D}=\sum_{j=1}^n\mathbf{e}_j\partial_{x_j}$ in terms of the fractional operator $(-Δ)^{\frac{1}{2}}$ of order $1$ and of the Riesz-Hilbert type operator $\mathcal{H}$ we will investigate the fundamental solutions of the space-fractional Dirac equation of Lévy-Feller type $$\partial_tΦ_α(\mathbf{x},t;θ)=-(-Δ)^{\fracα{2}}\exp\left( \frac{iπθ}{2} \mathcal{H}\right)Φ_α(\mathbb{x},t;θ) $$ involving the fractional Laplacian $-(-Δ)^{\fracα{2}}$ of order $α$, with $2m\leq α<2m+2$ ($m\in \mathbb{N}$), and the exponentiation operator $\exp\left( \frac{iπθ}{2} \mathcal{H}\right)$ as the hypercomplex counterpart of the fractional Riesz-Hilbert transform carrying the \textit{skewness parameter} $θ$, with values in the range $|θ|\leq \min\{α-2m,2m+2-α\}$. Such model problem permits us to obtain hypercomplex counterparts for the fundamental solutions of higher-order heat-type equations $\partial_t F_M(x,t)=κ_M(\partial_x)^M F_M(x,t)$ $(M=2,3,\ldots)$ in case where the even powers resp. odd powers $\mathbf{D}^{2m}=(-Δ)^{m}$ ($M=α=2m$) resp. $\mathbf{D}^{2m+1}=(-Δ)^{m+\frac{1}{2}}\mathcal{H}$ ($M=α=2m+1$) of $\mathbf{D}$ are being considered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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