Update 3_vector_spaces.md

src/3_vector_spaces.md

@@ -25,7 +25,7 @@ The lecture on vector spaces consists of two parts, each with their own video:
   
   The expression of $\vec{v}$ in terms of its components is
   $$
-  \vec{v} = \lp v_1, v_2, \ldots, v_n\rp \, ,
+  \vec{v} = (v_1, v_2,..., v_n) \, ,
   $$
  
   We will denote by ${\mathcal V}^n$ the **vector space** composed