A matrix analysis approach to discrete comparison principles for nonmonotone PDE
A matrix analysis approach to discrete comparison principles for nonmonotone PDE
复制标题
非单调偏微分方程离散比较原理的矩阵分析方法
DOI:
10.1007/s11075-019-00713-x
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发表时间:
2020
影响因子:
2.1
通讯作者:
Zhu, Yunrong
中科院分区:
文献类型:
--
作者:
Pollock, Sara;Zhu, Yunrong
We present a linear algebra approach to establishing a discrete comparison principle for a nonmonotone class of quasilinear elliptic partial differential equations. In the absence of a lower order term, local conditions on the mesh are required to establish the comparison principle and uniqueness of the piecewise linear finite element solution. We consider the assembled matrix corresponding to the linearized problem satisfied by the difference of two solutions to the nonlinear problem. Monotonicity of the assembled matrix establishes a maximum principle for the linear problem and a comparison principle for the nonlinear problem. The matrix analysis approach to the discrete comparison principle yields sharper constants and more relaxed mesh conditions than does the argument by contradiction used in previous work.
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DOI:
10.1002/sapm1964431117
发表时间:
1964
期刊:
Journal of Mathematics and Physics
影响因子:
--
作者:
J. Bramble;B. Hubbard
通讯作者:
B. Hubbard
影响因子:
2.1
作者:
F. Bouchon
通讯作者:
F. Bouchon
影响因子:
2.1
作者:
Sara N. Pollock;Yunrong Zhu
通讯作者:
Sara N. Pollock;Yunrong Zhu
DOI:
--
发表时间:
1974
期刊:
影响因子:
--
作者:
N. Trudinger
通讯作者:
N. Trudinger
影响因子:
2.8
作者:
Pollock, Sara;Zhu, Yunrong
通讯作者:
Zhu, Yunrong