\begin{align} \underset{\mathbf{W}}{\operatorname{arg,min}},, & |\mathbf{W}\mathbf{W}^\top \mathbf{X}-\mathbf{X}|_\mathrm{F}^2 & & \ \text{s.t.},,,,, & \mathbf{W ...
","","- **Identities 1.5 - total differential**. Actually, all identities 1 are the matrix form of the total differential in eq. (19).",""," ","","### 1.2 Deriving ...
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