--- a/progs/fun_llvm.scala	Tue Oct 08 21:12:52 2019 +0100
+++ b/progs/fun_llvm.scala	Wed Oct 09 21:37:17 2019 +0100
@@ -141,6 +141,11 @@
     val is2 = compile_exp(e2)
     i"%$x = $is1" ++ is2
   }
+  case KLet(x: String, e1: KExp, e2: KExp) => {
+    val is1 = compile_exp(e1)
+    val is2 = compile_exp(e2)
+    i"%$x = $is1" ++ is2
+  }
   case KIfeq(x1, x2, a1, a2) => {
     val if_br = Fresh("if_br")
     val else_br = Fresh("else_br")

--- a/progs/pow.scala	Tue Oct 08 21:12:52 2019 +0100
+++ b/progs/pow.scala	Wed Oct 09 21:37:17 2019 +0100
@@ -6,6 +6,12 @@
   case n => concat(A, pow(A, n- 1))
 }
 
+val A = Set("1", "2", "3", "")
+val B = Set("1", "2", "3", "4", "5", "6", "")
+concat(A, B).size                     // -> 28 
+pow(B, 3).size 
+
+
 val A = Set("a", "b", "c", "d")
 pow(A, 4).size                            // -> 256
 

Binary file slides/slides03.pdf has changed

--- a/slides/slides03.tex	Tue Oct 08 21:12:52 2019 +0100
+++ b/slides/slides03.tex	Wed Oct 09 21:37:17 2019 +0100
@@ -465,7 +465,7 @@
 For the regular expression \bl{$(.^*)a\,(.^{\{n\}})bc$}\bigskip\bigskip
 
 % \begin{center}
-\mbox{}\hspace{-11mm}
+\mbox{}\hspace{-11.5mm}
 	\begin{tikzpicture}[>=stealth',very thick, auto,
 	every state/.style={minimum size=5pt,inner sep=1pt,
 		draw=blue!50,very thick,fill=blue!20},scale=1, node distance=5mm,
@@ -1226,7 +1226,7 @@
 \onslide<2->{
 \begin{center}
 \begin{tabular}{r@ {\hspace{2mm}}c@ {\hspace{2mm}}l}
-\bl{$\mbox{Q}_0$} & \bl{$=$} & \bl{$\ONE + \mbox{Q}_0\,b + \mbox{Q}_1\,b +  \mbox{Q}_2\,b$}\\
+\bl{$\mbox{Q}_0$} & \bl{$=$} & \bl{$\mbox{Q}_0\,b + \mbox{Q}_1\,b +  \mbox{Q}_2\,b + \ONE$}\\
 \bl{$\mbox{Q}_1$} & \bl{$=$} & \bl{$\mbox{Q}_0\,a$}\\
 \bl{$\mbox{Q}_2$} & \bl{$=$} & \bl{$\mbox{Q}_1\,a + \mbox{Q}_2\,a$}\\