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@stanlee321
Created November 24, 2019 03:14
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Latex
https://www.codecogs.com/latex/eqneditor.php
\frac{\partial^{2} L}{\partial^{2} w} = \sum_{i=1}^{m} (Diag(\hat{y_i})- {\hat{y_i}^T}\hat{y_i}))\otimes{\hat{x_i}^T}\hat{x_i} = (Diag(Y) - {Y}^T \cdot Y)\otimes({X}^T\cdot X)
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