On a superconvergent finite element scheme for elliptic systems. II. Boundary conditions of Newton's or Neumann's type

On a superconvergent finite element scheme for elliptic systems. II. Boundary conditions of Newton's or Neumann's type
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DOI:
10.21136/am.1987.104251
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发表时间:
1987
期刊:
--
影响因子:
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通讯作者:
I. Hlavácek;M. Křížek
I. Hlavácek;M. Křížek
中科院分区:
其他
文献类型:
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作者:
I. Hlavácek;M. Křížek

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摘要给出了有限元素解的导数的一个简单的苏佩超收敛格式,用有限元素解二阶Newton型或Neumann型带边界条件的椭圆方程组.对于边界光滑的有界平面域,证明了L2-范数中导数的局部0(h3//2)-苏佩r超收敛性.本文是文[2]的一个直接推广,其中讨论了一个具有Dirichlet边界条件的奇异问题.
Summary. A simple supe r conve r gent scheme fo r the de r ivatives of fi n ite eleme n t solutio n is p r ese n ted, whe n li n ea r t r ia n gula r eleme n ts are employed to solve seco n d order elliptic systems with bou n da r y co n ditio n s of Newto n 's o r Neuma nn 's type. Fo r bou n ded pla n e domai n s with smooth bou n da r y the local 0(h 3//2 ) -supe r co n ve r ge n ce of the de r ivatives i n the L 2 - n o r m is proved. The paper is a direct co n ti n uatio n of [2], where a n a n alogous problem with Di r ichlet's bou n dary co n ditio n s is treated .