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5.8.1 内容与公式中英文不一致

Open GdZ opened this issue 7 years ago • 1 comments

  1. 英文148页公式5.93和中文公式5.93不一致

    • 英文: $$=\frac{1}{m-1}W^TX^TXW$$

    • 中文: $$=\frac{1}{m-1}W^TX^TX^TW$$

  2. 中文少了一句话

    • 英文 where we use the fact that $U^TU = I$ because the U matrix of the singular value definition is defined to be orthonormal. This shows that if we take $z=x^TW$, we can ensure that the covariance of z is diagonal as required:

    • 中文 其中,我们使用 $U^TU = I$,因为根据奇异值的定义矩阵 U 是正交的。这表明 z 的协方差满足对角的要求:

GdZ avatar May 21 '18 20:05 GdZ

@GdZ Thanks, got it.

zsdonghao avatar May 21 '18 21:05 zsdonghao