The lumped mass finite element method for a parabolic problem

The lumped mass finite element method for a parabolic problem
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DOI:
10.1017/s0334270000004549
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发表时间:
1985-01
期刊:
The Journal of the Australian Mathematical Society. Series B. Applied Mathematics
影响因子:
--
通讯作者:
C. M. Chen;V. Thomée
C. M. Chen;V. Thomée
中科院分区:
其他
文献类型:
--
作者:
C. M. Chen;V. Thomée

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对于二维热方程,我们考虑了标准Galerkin方法的集中质量修正的半离散和全离散变形,利用分段线性逼近函数,证明了在L ~ 2中的最优阶和在L ~ ∞中的几乎最优阶的误差估计。
Abstract For the heat equation in two space dimensions we consider semidiscrete and totally discrete variants of the lumped mass modification of the standard Galerkin method, using piecewise linear approximating functions, and demonstrate error estimates of optimal order in L2 and of almost optimal order in L∞.