ML@矩阵微积分基础矩阵微积分@Matrix calculus
这个矩阵我们称为雅克比矩阵 (Jacobian matrix),一下是分子记法(分子布局 (numerator layout))J=[∇f(x,y)∇g(x,y)]=[∂f(x,y)∂x∂f(x,y)∂y∂g(x,y)∂x∂g(x,y)∂y]\mathcal{J}=\left[\begin{array}{l}\nabla f(x, y) \\\nabla g(x, y)\end{array}\right]=\left[\begin{array}{ll}\frac{\partial f(x, y)
