Cut/ND-plugin.html
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     1 <HTML lang=en>
       
     2 <HEAD>
       
     3 <TITLE> Christian Urban </TITLE>
       
     4 <BASE HREF="http://www4.in.tum.de/~urbanc/Cut/">
       
     5 </HEAD>
       
     6 
       
     7 <BODY TEXT="#000000" 
       
     8       BGCOLOR="#000080" 
       
     9       LINK="#0000EF" 
       
    10       VLINK="#51188E" 
       
    11       ALINK="#FF0000">
       
    12 
       
    13 <TABLE WIDTH="100%" 
       
    14        COLS="2" 
       
    15        BGCOLOR="#000080" 
       
    16        BORDER="0"   
       
    17        FRAME="none"  
       
    18        CELLPADDING="10"     
       
    19        CELLSPACING="2"
       
    20        RULES="COLS,ROWS">
       
    21 
       
    22 <!-- left column -->
       
    23 <TR>
       
    24 <TD BGCOLOR="#FFFFFF" 
       
    25     WIDTH="24%" 
       
    26     VALIGN="TOP" 
       
    27     ROWSPAN="4">
       
    28 
       
    29 <B>Links</B><BR>
       
    30 <A HREF="http://www4.in.tum.de/~urbanc/index.html">Home</A><BR>
       
    31 <A HREF="http://www4.in.tum.de/~urbanc/Cut/cutapplet.html">Applet Home</A><BR><BR><p>
       
    32  
       
    33 <B>Java Versions</B><BR>
       
    34 <A HREF="http://www4.in.tum.de/~urbanc/Cut/CL.html">CL</A><BR>
       
    35 <A HREF="http://www4.in.tum.de/~urbanc/Cut/LJT.html">LJT</A><BR>
       
    36 <A HREF="http://www4.in.tum.de/~urbanc/Cut/ND.html">ND</A><BR><BR>
       
    37 
       
    38 <B>Plugin Versions</B><BR>
       
    39 <A HREF="http://www4.in.tum.de/~urbanc/Cut/CL-plugin.html">CL</A><BR>
       
    40 <A HREF="http://www4.in.tum.de/~urbanc/Cut/LJT-plugin.html">LJT</A><BR>
       
    41 <A HREF="http://www4.in.tum.de/~urbanc/Cut/ND-plugin.html">ND</A><BR>
       
    42 
       
    43 <BR>
       
    44 <BR>
       
    45 
       
    46 <A HREF="http://isabelle.in.tum.de/nominal/">
       
    47 <IMG SRC="ribbon.gif" ALT="" style="width: 114px; height: 100px;" align="left">
       
    48 </A>
       
    49 </TD>
       
    50 
       
    51 
       
    52 <!-- right column -->
       
    53 <TD BGCOLOR="#FFFFFF" WIDTH="75%">
       
    54 <A NAME="Home"></A>
       
    55 <H2>Normalisation in intuitionistic natural deduction</H2>
       
    56 
       
    57 This applet implements the bog-standard version of intuitionistic
       
    58 natural deduction. If you are familiar with any textbook on proof
       
    59 theory (e.g. this <A HREF="http://www.amazon.co.uk/exec/obidos/ASIN/0521572231/ref=ed_ra_of_dp/026-0727529-0066055">one</A>), then most things will look very familiar to you.
       
    60 Note that natural deduction is here implemented in `sequent style'.
       
    61 </TD>
       
    62 </TR>
       
    63 
       
    64 <TR>
       
    65 <TD BGCOLOR="#FFFFFF" WIDTH="75%">
       
    66 <B>How to use it?</B>&nbsp;
       
    67 If your browser is working correctly, then you will see a window 
       
    68 with two examples (more added if I have time or you suggest one). 
       
    69 When you press on one of the buttons, a new window will pop up. What 
       
    70 follows is a brief explanation of all the features available in this window. 
       
    71 </TD>
       
    72 </TR>
       
    73 
       
    74 <TR>
       
    75 <TD BGCOLOR="#FFFFFF" WIDTH="75%">
       
    76 <B>Buttons and Keys</B>
       
    77 <UL>
       
    78 <LI> The buttons 
       
    79       &nbsp;&nbsp;&nbsp;<IMG SRC="http://www4.in.tum.de/~urbanc/Cut/x.jpg">&nbsp;&nbsp;&nbsp;
       
    80      `fire' beta-redexes (nothing surprising here).
       
    81 <LI> If you use the <B>left mouse button</B> for pressing on those buttons,
       
    82      then the new proof will appear inside the window. Whereas if you use 
       
    83      the <B>right mouse button</B>, a new window will pop up and  
       
    84      the new proof will be displayed in this window. Use the right mouse 
       
    85      button if you want to compare a proof and its reduct.
       
    86 <LI> The keys <B>Page-up</B> and <B>Page-down</B> zoom in or out of a proof
       
    87      respectively. 
       
    88 </UL>
       
    89 </TD>
       
    90 </TR>
       
    91 
       
    92 <TR>
       
    93 <TD BGCOLOR="#FFFFFF"  WIDTH="75%">
       
    94 <B>Menu Functions</B>
       
    95 
       
    96 <UL>
       
    97 <LI> <B>Zoom in</B> and <B>Zoom out</B> work like Page-up and Page-down, 
       
    98      respectively.
       
    99 <LI> <B>Unicode</B>&nbsp; If this radiobutton is switched on, logic symbols 
       
   100      are displayed in unicode, otherwise in ascii. (This is for the 
       
   101      poor guys who have a browser and/or operating system which cannot handle 
       
   102      unicode.)
       
   103 <LI> <B>Labels</B>&nbsp; As mentioned earlier the sequents are composed of 
       
   104      two sets of labelled 
       
   105      formulae, not multisets of formulae as in the standard formulation 
       
   106      of sequent calculus. Enabling this radiobutton causes that labels are 
       
   107      drawn. Use this when you are unsure where implicit contractions are. 
       
   108 <LI> <B>Compact printing</B>&nbsp; Usually formulae are weakened only in axiom. 
       
   109      If this radiobutton is switched on (default), then, in order to save space, 
       
   110      formulae are weakened as soon as possible.
       
   111 </UL> 
       
   112 </TD>
       
   113 </TR>
       
   114 
       
   115 </TABLE>
       
   116 <center>
       
   117 <!--"CONVERTED_APPLET"-->
       
   118 <!-- HTML CONVERTER -->
       
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   120 WIDTH = 1 HEIGHT = 1  codebase="http://java.sun.com/products/plugin/1.3.1/jinstall-131-win32.cab#Version=1,3,1,0">
       
   121 <PARAM NAME = CODE VALUE = "MyApplet.class" >
       
   122 <PARAM NAME = ARCHIVE VALUE = MyApplet.zip >
       
   123 
       
   124 <PARAM NAME="type" VALUE="application/x-java-applet;jpi-version=1.3.1">
       
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   126 <PARAM NAME = "calculi" VALUE ="C">
       
   127 <COMMENT>
       
   128 <EMBED type="application/x-java-applet;jpi-version=1.3.1"  CODE = "MyApplet.class" ARCHIVE = MyApplet.zip WIDTH = 1 HEIGHT = 1 calculi = "C"  scriptable=false pluginspage="http://java.sun.com/products/plugin/1.3.1/plugin-install.html"><NOEMBED>
       
   129 <p><blink><FONT COLOR="#800000">
       
   130 Applet should appear in a new window, but you don't have Java enabled in your browser.
       
   131 </FONT></blink><p>
       
   132 </NOEMBED>
       
   133 </EMBED>
       
   134 </COMMENT>
       
   135 </OBJECT>
       
   136 
       
   137 <!--
       
   138 <APPLET CODE = "MyApplet.class" ARCHIVE = MyApplet.zip WIDTH = 1 HEIGHT = 1>
       
   139 <PARAM NAME = "calculi" VALUE ="C">
       
   140 <p><blink><FONT COLOR="#800000">
       
   141 Applet should appear in a new window, but you don't have Java enabled in your browser.
       
   142 </FONT></blink><p>
       
   143 
       
   144 </APPLET>
       
   145 -->
       
   146 
       
   147 
       
   148 <!--"END_CONVERTED_APPLET"-->
       
   149 
       
   150 
       
   151 </center>
       
   152 <P><!-- Created:  Tue Jul  3 21:01:42 BST 2001 -->
       
   153 <!-- hhmts start -->
       
   154 Last modified: Sat Mar  3 05:16:58 CET 2007
       
   155 <!-- hhmts end -->
       
   156 </BODY>
       
   157 </HTML>