1.  lower derivate
2.  lower derivative
3.  lower differential coefficient

• 1. 下导数: Lower Differential Coefficient | lower derivative | lower derivate
• 2. 狄尼下导数: lower dini derivative
• 3. 一般下导数: general lower derivate

更多释义

• 1.有一个极值问题，也有关于拉格朗日乘数法的，链式法则也会有的,约束条件下偏导数当然不会漏掉。
  Expect one about a min/max problem, something about Lagrange multipliers, something about the chain rule and something about constrained partial derivatives.
  dict.yoduao.com
• 2.我们来用方向导数，来描述一下相同的东西。
  Let's say the same thing in terms of directional derivatives.
  dict.yoduao.com
• 3.你可以想象一下对它们继续求偏导数，将会得到很多偏导数，所以我们要，仔细考虑那时的情形。
  You can imagine that if you keep taking partials you may end up with more and more, so we will have to figure out carefully what the condition should be.
  dict.yoduao.com

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