minor changes

documents/math-minimal-distance-to-cubic-function/problem-description.tex

@@ -1,7 +1,7 @@
 \chapter{Description of the Problem}
 Let $f: D \rightarrow \mdr$ with $D \subseteq \mdr$ be a polynomial function and $P \in \mdr^2$
 be a point. Let $d_{P,f}: \mdr \rightarrow \mdr_0^+$
-be the Euklidean distance of a point $P$ to a point $\left (x, f(x) \right )$
+be the Euklidean distance of $P$ to a point $\left (x, f(x) \right )$
 on the graph of $f$:
 \[d_{P,f} (x) := \sqrt{(x - x_P)^2 + (f(x) - y_P)^2}\]