--- a/hws/hw02.tex	Fri Sep 30 06:03:46 2022 +0100
+++ b/hws/hw02.tex	Sat Oct 01 21:47:32 2022 +0100
@@ -48,7 +48,7 @@
       Compute what the derivative of $r$ is with respect to
       $a$, $b$ and $c$. Is $r$ nullable?
 
-\item (Moved to HW3)
+\item Prove that if $r$ is nullable then $r^{\{n\}} \equiv r^{\{..n\}}$.
   
 \item Define what is meant by the derivative of a regular
       expressions with respect to a character. (Hint: The