Liujie Lu

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> @Liam0205 > @tcoln `` \frac{\partial L}{\partial f}\frac{\partial f}{\partial z} `` 可以是负数啊,它与 `` x_i `` 的乘积决定梯度下降的方向。 黄指导是否可以修改下评论的格式,很多公式无法展现很好显示啊,需要某种插件么?

yeah。i have the same question with u。@oahziur 。could you help us solve this problem?