二阶奇异性 second order singularity 二阶椭圆方程 second order elliptic equation 二阶谓词演算 second predicate calculus ; second-order predicate calculus ..
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本文建立了二阶椭圆方程节点展开法数学理论，包括变分原理和误差估计等。
In this paper, the mathematical theory of the nodal expansion method for 2nd order elliptical equation including variational principle and error estimate is established.
得到了一类二阶散度型椭圆方程很弱解的一个正则性结果。
A regularity result of a class of second order divergence form elliptic equation was obtained.
讨论了二阶非线性椭圆型方程在多连通区域上的间断边值问题。
The article deals with the discontinuous boundary value problem for nonlinear elliptic complex equations of second order.
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