... fourth-order transverse deform 第四层横向变形 fourth-order elliptic equation 四阶椭圆方程 Fourth-order cross cumulant 四阶互累积量 ...
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fourth order elliptic equation 四阶椭圆方程
fourth order nonstationary elliptic equation 非稳态四阶椭圆方程
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By means of the variational approach, in a condition weaker than(AR) the existence of infinitely many solutions of fourth-order elliptic equation is discussed.
在比（AR）条件更弱的一类超线性条件之下，利用变分方法讨论了一类超线性四阶椭圆方程的无穷多解的存在性。
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