说明：关于c语言中一些常见的问题的源代码，例如，冒泡排序，水仙花数，求二次方程等。
C language on some common problems of the source code, for example, bubble sort, daffodils, seeking quadratic equations, etc.
研究了具有边界摄动的二次方程奇摄动问题。
In this paper, the singularly perturbed problems for a class of second degree equations with boundary perturbation are considered.
针对多变量二次方程组的求解问题，对XL算法的冗余性进行分析与改进。
Aiming at problems of solving multiple quadratic equation systems, the redundancy of extending equations by Extended Linearization (XL) algorithm is analyzed.
针对多变量二次方程组的求解问题，对XL算法的冗余性进行分析与改进。
Aiming at problems of solving multiple quadratic equation systems, the redundancy of extending equations by Extended Linearization (XL) algorithm is analyzed.
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