diff --git a/statistical-and-mathematical-methods-for-ai/sections/_finite_numbers.tex b/statistical-and-mathematical-methods-for-ai/sections/_finite_numbers.tex
index cc88224..bbd0419 100644
--- a/statistical-and-mathematical-methods-for-ai/sections/_finite_numbers.tex
+++ b/statistical-and-mathematical-methods-for-ai/sections/_finite_numbers.tex
@@ -183,7 +183,7 @@ To compute $x \oplus y$, a machine:
 
 A floating-point operation causes a small rounding error:
 \begin{equation}
-    \left\Vert \frac{(x \oplus y) - (x + y)}{x+y} \right\Vert < \varepsilon_{\text{mach}}
+    \left\vert \frac{(x \oplus y) - (x + y)}{x+y} \right\vert < \varepsilon_{\text{mach}}
 \end{equation}
 %
 Although, some operations may be subject to the \textbf{cancellation} problem which causes information loss.