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arXiv 1604.04427math.NAcs.NA
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具有椭圆算子分数次幂的奇异摄动边界值问题

A Singularly Perturbed Boundary Value Problems with Fractional Powers of Elliptic Operators

North-Eastern Federal University(东北联邦大学);Nuclear Safety Institute(核安全研究所)

Petr N. Vabishchevich

AI总结:

研究了分数次幂椭圆算子的奇异摄动边界值问题,采用伪抛物型方程时间依赖问题进行数值求解,提出两阶段方案并验证了二维模型问题的数值结果。

摘要:

考虑了一个分数次幂$0 < \varepsilon < 1$的二阶椭圆算子的边界值问题。当$\varepsilon \rightarrow 0$时,该问题呈现奇异摄动特性。通过将问题转化为伪抛物型方程的时间依赖问题进行数值求解。对于辅助的柯西问题,采用标准的两阶段方案并加入权重。给出了一个具有椭圆算子分数次幂的二维边界值问题的数值结果。我们的工作聚焦于解决$0 < \varepsilon \ll 1$的边界值问题。

英文摘要:

A boundary value problem for a fractional power $0 < \varepsilon < 1$ of the second-order elliptic operator is considered. The boundary value problem is singularly perturbed when $\varepsilon \rightarrow 0$. It is solved numerically using a time-dependent problem for a pseudo-parabolic equation. For the auxiliary Cauchy problem, the standard two-level schemes with weights are applied. The numerical results are presented for a model two-dimen\-sional boundary value problem with a fractional power of an elliptic operator. Our work focuses on the solution of the boundary value problem with $0 < \varepsilon \ll 1$.

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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