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[PUBLISHER] Merge #44
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* PUSH NOTE : 子集枚举.md

* PUSH NOTE : index.md

* PUSH NOTE : AGC031D A Sequence of Permutations.md

* PUSH NOTE : index.md

* PUSH NOTE : 背包.md

* PUSH NOTE : 高斯消元.md

* PUSH NOTE : 逆元.md

* PUSH NOTE : 欧拉函数.md

* PUSH NOTE : 从gcd到exgcd.md
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hyj0824 authored Dec 15, 2024
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3 changes: 2 additions & 1 deletion docs/数学/线性代数/高斯消元.md
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publish: true
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**别随便做初等列变换!要不然解出来解的顺序会变!**

**系数化为1的时候,要把主元系数单独存起来,否则就覆盖掉了**
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## 求行列式
![行列式 > 定义](../../../%E8%A1%8C%E5%88%97%E5%BC%8F.md#定义)
![行列式 > 定义](./%E8%A1%8C%E5%88%97%E5%BC%8F.md#定义)
方法是$O(n!)$,显然不可,我们可以化为$O(n^3)$。
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