Discrete comparison principles for quasilinear elliptic PDE
Discrete comparison principles for quasilinear elliptic PDE
复制标题
拟线性椭圆偏微分方程的离散比较原理
DOI:
10.1016/j.apnum.2020.04.013
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发表时间:
2020
影响因子:
2.8
通讯作者:
Zhu, Yunrong
中科院分区:
文献类型:
--
作者:
Pollock, Sara;Zhu, Yunrong
Comparison principles are developed for piecewise linear finite element approximations of quasilinear elliptic partial differential equations. We consider the analysis of a class of nonmonotone Leray-Lions problems featuring both nonlinear solution and gradient dependence in the principal coefficient, and a solution dependent lower-order term. Sufficient local and global conditions on the discretization are found for conforming finite element solutions to satisfy a comparison principle, which implies uniqueness of the solution. For problems without a lower-order term, our analysis shows the meshsize is only required to be locally controlled, based on the variance of the computed solution over each element. We include a discussion of the simpler semilinear case where a linear algebra argument allows a sharper mesh condition for the lower order term.
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影响因子:
2
作者:
R. Verfürth
通讯作者:
R. Verfürth
影响因子:
2.1
作者:
Sara N. Pollock;Yunrong Zhu
通讯作者:
Sara N. Pollock;Yunrong Zhu
影响因子:
2.4
作者:
Scott Congreve;T. Wihler
通讯作者:
T. Wihler
影响因子:
2.1
作者:
L. Diening;C. Kreuzer;S. Schwarzacher
通讯作者:
S. Schwarzacher
DOI:
--
发表时间:
1974
期刊:
影响因子:
--
作者:
N. Trudinger
通讯作者:
N. Trudinger