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Update errata.md
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Sm1les authored Aug 20, 2024
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- 127页,“式(8.7)的推导”中的最后一句话“两边同除$\frac{1}{2}$”改为“两边同乘$\frac{1}{2}$”(感谢@Acumen7
- 181页,“式(10.14)的推导”中将式(10.14)化简成式(10.15)目标函数形式时,第⑥步中的$-\boldsymbol{x}_i^{\top}\mathbf{W}^{\top} \mathbf{x}_i$改为$-\boldsymbol{x}_i^{\top} \mathbf{W}\mathbf{W}^{\top} \mathbf{x}_i$(感谢@huishengye
- 195页,“式(10.31)的目标函数形式”中的$\operatorname{tr}\left(\mathbf{Z}\mathbf{M}\mathbf{Z}\mathbf{Z}^{\top}\right)$改为$\operatorname{tr}\left(\mathbf{Z}\mathbf{M}\mathbf{Z}^{\top}\right)$(感谢@CoderKingXY
- 86页,“样本内积$\boldsymbol{x}_i^{\mathrm{T}\boldsymbol{x}_j}$”改为“样本内积$\boldsymbol{x}_i^{\mathrm{T}}\boldsymbol{x}_j$”(感谢南瓜书读者交流群13的@.)

## 第2版第5次印刷(2023.11)
- 98页,“6.6.5 核对率回归”中的第2个公式,其中的$\boldsymbol{x}_{i}$改为$\boldsymbol{z}_{i}$(感谢南瓜书读者交流群11的@[太阳]🌈)
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