Fix ch03

ironartisan · web-flow · commit 37cf03a5c338 · 2024-11-11T19:14:54.000+08:00
diff --git a/docs/ch03/ch03.md b/docs/ch03/ch03.md
@@ -193,7 +193,7 @@ $$
   $$
   其中 $h_{ii}$ 是对应的Hessian矩阵的对角元素，定义为：
   $$
-  h_{ii} = \frac{\partial^2 L}{\partial w_i \partial w_j}
+   h_{i i}=\frac{\partial^2 L}{\partial w_i^2}
   $$
 
 - **剪枝原则**：
