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中文摘要：
Lie对称法和微分形式吴方法相结合的方法来计算微分方程（组）的对称.首先,用Lie对称法得到对称的确定方程组,该方程组一般比较大,难于求解,然后,用微分形式吴方法把确定方程组分解为一系列较简单的方程组来求解,文中算例说明这种方法是有效的.
英文摘要：
Lie symmetry method combined with differential form of Wu’s method was used to compute symmetry of differential equations.Determining equations of symmetry were obtained from Lie symmetry method,but those were large and difficult to solve.Differential form of Wu’s method was used to decompose determining equations into a series of equations,which were easy to solve.Examples were made to show that this method was effective.
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