Update 第三章_深度学习基础.md

ch03_深度学习基础/第三章_深度学习基础.md

@@ -21,7 +21,7 @@
 $$
 output = \left\{
 \begin{aligned}
-0, \quad if \ \ \sum_i w_i x_i \le threshold \\
+0, \quad if \ \ \sum_i w_i x_i \leqslant threshold \\
 1, \quad if \ \ \sum_i w_i x_i > threshold
 \end{aligned}
 \right.