fix clarity

pages/Math429/Math429_L17.md

@@ -12,7 +12,7 @@ A **linear functional** on $V$ is a linear map from $V$ to $\mathbb{F}$.
 
 #### Definition 3.110
 
-The **dual space** of V denoted by $V'$ ($\check{V},V^*$) is given by $V'=\mathscr{L}(V,\mathbb{F})$.
+The **dual space** of V denoted by $V'$ (or in some books $\check{V},V^*$) is given by $V'=\mathscr{L}(V,\mathbb{F})$.
 
 The elements of $V'$ are also called **linear functional**.