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Cut/cutapplet.html
changeset 98 e10eb390c103 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Cut/cutapplet.html	Thu Mar 15 15:50:18 2012 +0000
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+<HTML lang=en>
+<HEAD>
+<TITLE> Christian Urban </TITLE>
+<BASE HREF="http://www4.in.tum.de/~urbanc/">
+</HEAD>
+
+<BODY TEXT="#000000" 
+      BGCOLOR="#000080" 
+      LINK="#0000EF" 
+      VLINK="#51188E" 
+      ALINK="#FF0000">
+
+<TABLE WIDTH="100%" 
+       COLS="2" 
+       BGCOLOR="#000080" 
+       BORDER="0"   
+       FRAME="none"  
+       CELLPADDING="10"     
+       CELLSPACING="2"
+       RULES="COLS,ROWS">
+
+<!-- left column -->
+<TR>
+<TD BGCOLOR="#FFFFFF" 
+    WIDTH="24%" 
+    VALIGN="TOP" 
+    ROWSPAN="2">
+
+<B>Links</B><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/index.html">Home</A><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/cutapplet.html">Applet Home</A><BR><BR>
+
+<B>Java Versions</B><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/CL.html">CL</A><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/LJT.html">LJT</A><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/ND.html">ND</A><BR><BR>
+
+<B>Plugin Versions</B><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/CL-plugin.html">CL</A><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/LJT-plugin.html">LJT</A><BR>
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/ND-plugin.html">ND</A><BR>
+
+<BR>
+<BR>
+
+<A HREF="http://isabelle.in.tum.de/nominal/">
+<IMG SRC="ribbon.gif" ALT="" style="width: 114px; height: 100px;" align="left">
+</A>
+</TD>
+
+
+<!-- right column -->
+<TD BGCOLOR="#FFFFFF" WIDTH="75%">
+<A NAME="Home"></A>
+<H2>Applet for Cut-Elimination and Normalisation </H2>
+
+<FONT COLOR="#800000"><B>Warning:</B></FONT>
+These pages are still under construction and designed for the conoscenti
+only. If you encounter any problems, email me. Some general information
+about the applet is given below.<p> 
+
+The applet is outcome of my interest in cut-elimination. It helps to 
+explore reduction trees in a slight variant of the sequent calculus LK, 
+and also reduction trees in Herbelin's calculus LJT (as presented 
+<A HREF="http://www-theory.dcs.st-and.ac.uk/~rd/publications/MJES/">here</A>) 
+and in the standard formulation of natural deduction for intuitionistic 
+logic. Given for example the following classical sequent proof<p>
+
+<center>
+<IMG SRC="Cut/ex1.jpg" ALT="" ALIGN=CENTER>
+</center><p>
+
+you can produce by simply pressing the buttons L and R the following 
+two cut-free proofs.<p>
+
+<center>
+<IMG SRC="Cut/ex2.jpg" ALT="" ALIGN=CENTER>
+<IMG SRC="Cut/ex3.jpg" ALT="" ALIGN=CENTER>
+</center><p>
+
+If you ever have done cut-elimination by hand, then you 
+know how useful this applet is.<p>
+
+<img ALIGN=BOTTOM ALT="" SRC="new.gif"> The applet is particularly useful for doing 
+some calculations finding out what the (proof-theoretical) semantics for classical logic 
+should look like. Some informal notes are 
+<A HREF="http://www4.in.tum.de/~urbanc/Cut/notes.html">here</A>.
+<p>
+
+
+The applet needs at least <B>Java 1.2</B> including the
+<B>Swing</B> libraries. Some browsers support these requirements 
+directly, and if you are one of the lucky to have such a browser 
+you can access the three calculi by pressing on one of the 
+following links.
+
+<UL>
+<LI><A HREF="http://www4.in.tum.de/~urbanc/Cut/CL.html">CL - cut-elimination 
+in classical logic</A>
+<LI><A HREF="http://www4.in.tum.de/~urbanc/Cut/LJT.html">LJT - cut-elimination in   
+intuitionistic logic</A> 
+<LI><A HREF="http://www4.in.tum.de/~urbanc/Cut/ND.html">ND - normalisation in 
+intuitionistic natural deduction</A><p>
+</UL><p> 
+
+If not, then your browser can most probably run the applet with 
+the help of a Java plugin. In this case follow the links below.
+
+<UL>
+<LI><A HREF="http://www4.in.tum.de/~urbanc/Cut/CL-plugin.html">CL - cut-elimination 
+in classical logic</A>
+<LI><A HREF="http://www4.in.tum.de/~urbanc/Cut/LJT-plugin.html">LJT - cut-elimination in   
+intuitionistic logic</A> 
+<LI><A HREF="http://www4.in.tum.de/~urbanc/Cut/ND-plugin.html">ND - normalisation in 
+intuitionistic natural deduction</A><p>
+</UL><p> 
+
+<TR>
+<TD BGCOLOR="#FFFFFF"  WIDTH="75%">
+For the curious: the applet is written in MLJ, which is being
+developed by 
+<A HREF="http://research.microsoft.com/~nick/">Benton</A>, 
+<A HREF="http://research.microsoft.com/~akenn/">Kennedy</A> and 
+<A HREF="http://research.microsoft.com/~crusso/">Russo</A>. 
+MLJ is a  dialect of SML that provides access to Java libraries; in my 
+opinion it is a really nifty language! I am using an improved version of 
+the MLJ-0.2 compiler.
+</TD>
+</TR>
+
+</TABLE>
+<P><!-- Created:  Tue Jul  3 21:01:42 BST 2001 -->
+<!-- hhmts start -->
+Last modified: Sat Mar  3 05:16:36 CET 2007
+<!-- hhmts end -->
+</BODY>
+</HTML>
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