<HEAD> <TITLE>"Subset Construction"</Title> </HEAD> <BODY> <A NAME="pgtop"></A> <A HREF="indexc.htm"><Img Src="flconts.gif"></A> <A HREF="index31.htm"><Img Src="fllarrow.gif"></A> <A HREF="index33.htm"><Img Src="flrarrow.gif"></A> <BR> <IMG BORDER=0 SRC="index32.gif" > <HR> <A NAME="pgbot"></A> <BR> <FONT SIZE="-2">Published by Lotus® Freelance Graphics® </BODY>