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+<H3>FOCUS: a theory of stream-processing functions Isabelle/<A HREF="..">HOLCF</A></H3>
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+For introductions to FOCUSs, see 
+<UL>
+<LI><A HREF="http://www4.in.tum.de/publ/html.php?e=2">The Design of Distributed Systems - An Introduction to FOCUS</A>
+<LI><A HREF="http://www4.in.tum.de/publ/html.php?e=15">Specification and Refinement of a Buffer of Length One</A>
+<LI><A HREF="http://www4.in.tum.de/publ/html.php?e=321">Specification and Development of Interactive Systems: Focus on Streams, Interfaces, and Refinement</A>
+</UL>
+For slides on <A HREF="Buffer.html">Buffer.thy</A>, see <A HREF="http://isabelle.in.tum.de/HOLCF/1-Buffer.ps.gz">Coinduction beats induction on streams</A>.
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