diff --git a/quarto/limits/limits.qmd b/quarto/limits/limits.qmd
index 7e4bdb1..d62c5a1 100644
--- a/quarto/limits/limits.qmd
+++ b/quarto/limits/limits.qmd
@@ -18,7 +18,7 @@ using SymPy       # for symbolic limits
 ---
 
 
-An historic problem in the history of math was to find the area under the graph of $f(x)=x^2$ between $[0,1]$.
+A historic problem in the history of math was to find the area under the graph of $f(x)=x^2$ between $[0,1]$.
 
 
 There wasn't a ready-made formula for the area of this shape, as was known for a triangle or a square. However, [Archimedes](http://en.wikipedia.org/wiki/The_Quadrature_of_the_Parabola) found a method to compute areas enclosed by a parabola and line segments that cross the parabola.