# HG changeset patch
# User Christian Urban <christian dot urban at kcl dot ac dot uk>
# Date 1382904430 0
# Node ID ef48e378c44e78f430fb4560e4e0ed749931a0b1
# Parent  66b699c80479f894de6310534a3ccb9cb0cd12e1
updated

diff -r 66b699c80479 -r ef48e378c44e hws/hw04.pdf
Binary file hws/hw04.pdf has changed
diff -r 66b699c80479 -r ef48e378c44e hws/hw04.tex
--- a/hws/hw04.tex	Sun Oct 27 15:16:42 2013 +0000
+++ b/hws/hw04.tex	Sun Oct 27 20:07:10 2013 +0000
@@ -18,7 +18,7 @@
 
 \item What is the language recognised by the regular expressions $(\varnothing^*)^*$.
 
-\item If a regular expression $r$ does not contain any occurrence of $\varnothing$ 
+\item If a regular expression $r$ does not contain any occurrence of $\varnothing$,  
 is it possible for $L(r)$ to be empty?
 
 \item Assume that $s^{-1}$ stands for the operation of reversing a
diff -r 66b699c80479 -r ef48e378c44e hws/hw05.pdf
Binary file hws/hw05.pdf has changed