helm/www/lambdadelta/news.html

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   8     <meta name="author" content="Ferruccio Guidi" />
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  22     <div class="head1">The Formal System λδ (\lambda\delta)</div>
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  30       <table cellpadding="4" cellspacing="0">
  31         <tbody>
  32           <tr>
  33             <td class="snns capitalize italic sky">
  34               <a href="http://lambdadelta.info/index.html">home</a>
  35             </td>
  36             <td class="snns capitalize italic magenta">
  37               <a href="http://lambdadelta.info/news.html">news</a>
  38             </td>
  39             <td class="snns capitalize italic orange">
  40               <a href="http://lambdadelta.info/documentation.html">documentation</a>
  41             </td>
  42             <td class="snns capitalize italic green">
  43               <a href="http://lambdadelta.info/specification.html">specification</a>
  44             </td>
  45             <td class="snnn capitalize italic green">
  46               <br />
  47             </td>
  48             <td class="snns capitalize italic green">
  49               <a href="http://lambdadelta.info/implementation.html">implementation</a>
  50             </td>
  51             <td class="ssnn capitalize italic green">
  52               <br />
  53             </td>
  54           </tr>
  55           <tr>
  56             <td class="snns capitalize sky">
  57               <a href="http://lambdadelta.info/index.html#foreword">foreword</a>
  58             </td>
  59             <td class="snns capitalize magenta">
  60               <a href="http://lambdadelta.info/news.html#milestones">milestones</a>
  61             </td>
  62             <td class="snns capitalize orange">
  63               <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
  64             </td>
  65             <td class="snns capitalize green">
  66               <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
  67             </td>
  68             <td class="snnn capitalize green">(<a href="http://lambdadelta.info/ground_2.html">background</a> - <a href="http://lambdadelta.info/basic_2.html">core</a> - <a href="http://lambdadelta.info/apps_2.html">applications</a>)</td>
  69             <td class="snns capitalize green">
  70               <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
  71             </td>
  72             <td class="ssnn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</td>
  73           </tr>
  74           <tr>
  75             <td class="snss capitalize sky">
  76               <a href="http://lambdadelta.info/index.html#citations">citations</a>
  77             </td>
  78             <td class="snss capitalize magenta">
  79               <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
  80             </td>
  81             <td class="snss capitalize orange">
  82               <a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
  83             </td>
  84             <td class="snss capitalize green">
  85               <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
  86             </td>
  87             <td class="snsn capitalize green">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
  88             <td class="snss capitalize green">
  89               <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
  90             </td>
  91             <td class="sssn capitalize green">
  92               <br />
  93             </td>
  94           </tr>
  95         </tbody>
  96       </table>
  97     </div>
  98     <!-- ===================================================================== -->
  99     <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="milestones">Milestones <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b3.png" />
 100     </div>
 101     <ul xmlns:ld="http://lambdadelta.info/">
 102       <li>
 103         <span class="emph delta">January 2015.</span>
 104       The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
 105       is updated with backports from the abandoned specification of λδ version 2.
 106    </li>
 107     </ul>
 108     <ul xmlns:ld="http://lambdadelta.info/">
 109       <li>
 110         <span class="emph gamma">December 2014.</span>
 111         <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is released.
 112       <ul>
 113           <li>
 114          The corrected specification of Landau's "Grundlagen der Analysis"
 115          is validated in λδ version 3.
 116       </li>
 117         </ul>
 118       </li>
 119     </ul>
 120     <ul xmlns:ld="http://lambdadelta.info/">
 121       <li>
 122         <span class="emph gamma">October 2014.</span>
 123         <a href="http://lambdadelta.info/documentation.html#ldJ2">λδ version 2A</a>
 124       is released.
 125    </li>
 126     </ul>
 127     <ul xmlns:ld="http://lambdadelta.info/">
 128       <li>
 129         <span class="emph beta">July 2014.</span>
 130       A new version of this site is online.
 131    </li>
 132     </ul>
 133     <ul xmlns:ld="http://lambdadelta.info/">
 134       <li>
 135         <span class="emph beta">June 2014.</span>
 136         <a href="http://lambdadelta.info/documentation.html#ldP8">First communication on λδ version 2.</a>
 137       </li>
 138     </ul>
 139     <ul xmlns:ld="http://lambdadelta.info/">
 140       <li>
 141         <span class="emph alpha">December 2012.</span>
 142       The character "_" is removed from the denomination "lambda_delta":
 143       <ul>
 144           <li>
 145          The denomination "\lambda\delta" is used in λδ-related texts.
 146       </li>
 147           <li>
 148          The denomination "lambdadelta" is used in λδ-related identifiers.
 149       </li>
 150           <li>
 151          Permanent λδ URL acquired:
 152          <a href="http://lambdadelta.info/">http://lambdadelta.info/</a>
 153          (pointing at this site).
 154       </li>
 155         </ul>
 156       </li>
 157     </ul>
 158     <ul xmlns:ld="http://lambdadelta.info/">
 159       <li>
 160         <span class="emph alpha">September 2011.</span>
 161       The denomination "lambda-delta" changes to "lambda_delta":
 162       <ul>
 163           <li>
 164          The character "-" is reserved in λδ textual syntax
 165          (recognized by "Helena 0.8.1").
 166       </li>
 167           <li>
 168          Eventually, the occurrences of the character "-"
 169          will be replaced by "_" in all λδ-related identifiers.
 170       </li>
 171           <li>
 172          In particular, this refactoring involves file names and path names.
 173       </li>
 174         </ul>
 175       </li>
 176     </ul>
 177     <ul xmlns:ld="http://lambdadelta.info/">
 178       <li>
 179         <span class="emph alpha">April 2011.</span>
 180       The specification of <a href="http://lambdadelta.info/specification.html#v2">λδ version 2</a>
 181       and related topics is restarted in
 182       <a href="http://matita.cs.unibo.it/">Matita 0.5</a>.
 183    </li>
 184     </ul>
 185     <ul xmlns:ld="http://lambdadelta.info/">
 186       <li>
 187         <span class="emph delta">February 2011.</span>
 188       The specification of λδ version 2 with Coq 7.3.1 is abandoned.
 189    </li>
 190     </ul>
 191     <ul xmlns:ld="http://lambdadelta.info/">
 192       <li>
 193         <span class="emph alpha">December 2010.</span>
 194       Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
 195    </li>
 196     </ul>
 197     <ul xmlns:ld="http://lambdadelta.info/">
 198       <li>
 199         <span class="emph beta">November 2010.</span>
 200         <a href="http://lambdadelta.info/implementation.html#v1">"Helena 0.8.1"</a> is released.
 201    </li>
 202     </ul>
 203     <ul xmlns:ld="http://lambdadelta.info/">
 204       <li>
 205         <span class="emph beta">September 2009.</span>
 206         <a href="http://lambdadelta.info/implementation.html#v0">"Helena 0.8.0"</a> is released and the
 207       <a href="http://lambdadelta.info/implementation.html#lddl">λδ Digital Library</a> is started.
 208    </li>
 209     </ul>
 210     <ul xmlns:ld="http://lambdadelta.info/">
 211       <li>
 212         <span class="emph alpha">June 2009.</span>
 213       "Helena", a <a href="http://lambdadelta.info/implementation.html#helena">validator for λδ version 2</a>,
 214       is available as a part of the <a href="http://helm.cs.unibo.it/">HELM</a> software.
 215    </li>
 216     </ul>
 217     <ul xmlns:ld="http://lambdadelta.info/">
 218       <li>
 219         <span class="emph alpha">September 2008.</span>
 220       This site is online.
 221    </li>
 222     </ul>
 223     <ul xmlns:ld="http://lambdadelta.info/">
 224       <li>
 225         <span class="emph delta">July 2008.</span>
 226         <a href="http://lambdadelta.info/documentation.html#ldJ1">First journal paper on λδ</a>
 227       accepted for publication.
 228    </li>
 229     </ul>
 230     <ul xmlns:ld="http://lambdadelta.info/">
 231       <li>
 232         <span class="emph delta">July 2008.</span>
 233       First <a href="http://helm.cs.unibo.it/procedural/">procedural reconstruction</a>
 234       for <a href="http://matita.cs.unibo.it/">Matita 0.5</a>
 235       of the λδ version 1 for Coq 7.3.1.
 236    </li>
 237     </ul>
 238     <ul xmlns:ld="http://lambdadelta.info/">
 239       <li>
 240         <span class="emph delta">June 2008.</span>
 241       The <a href="http://lambdadelta.info/specification.html#static1">
 242          HTML pages of the specification of λδ version 1 for Matita 0.5</a>
 243       are online.
 244    </li>
 245     </ul>
 246     <ul xmlns:ld="http://lambdadelta.info/">
 247       <li>
 248         <span class="emph delta">May 2008.</span>
 249       The specification of λδ version 1 is concluded.
 250    </li>
 251     </ul>
 252     <ul xmlns:ld="http://lambdadelta.info/">
 253       <li>
 254         <span class="emph alpha">March 2008.</span>
 255       The specification of λδ version 2 is started with Coq 7.3.1 (false start).
 256    </li>
 257     </ul>
 258     <ul xmlns:ld="http://lambdadelta.info/">
 259       <li>
 260         <span class="emph gamma">September 2007.</span>
 261       The <a href="http://lambdadelta.info/specification.html#dynamic1">
 262          specification of λδ version 1 for Matita 0.4</a>
 263       is online.
 264    </li>
 265     </ul>
 266     <ul xmlns:ld="http://lambdadelta.info/">
 267       <li>
 268         <span class="emph gamma">November 2006.</span>
 269         <a href="http://lambdadelta.info/documentation.html#ldR2">λδ version 1</a>
 270       is released.
 271    </li>
 272     </ul>
 273     <ul xmlns:ld="http://lambdadelta.info/">
 274       <li>
 275         <span class="emph beta">December 2005.</span>
 276         <a href="http://lambdadelta.info/documentation.html#ldP1">First communication on λδ version 1</a>.
 277    </li>
 278     </ul>
 279     <ul xmlns:ld="http://lambdadelta.info/">
 280       <li>
 281         <span class="emph alpha">May 2004.</span>
 282       The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
 283       is started with Coq 7.3.1.
 284    </li>
 285     </ul>
 286     <!-- ===================================================================== -->
 287     <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="visibility">Visibility <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b3.png" />
 288     </div>
 289     <ul xmlns:ld="http://lambdadelta.info/">
 290       <li>
 291         <span class="emph alpha">June 2014.</span>
 292       The <a href="http://www.google.com/">Google</a>
 293       search for "formal system lambda delta" gives
 294       5 resources about λδ in the first 6 results.
 295    </li>
 296     </ul>
 297     <ul xmlns:ld="http://lambdadelta.info/">
 298       <li>
 299         <span class="emph alpha">June 2014.</span>
 300       The <a href="http://www.yahoo.com/">Yahoo</a>
 301       search for "formal system lambda delta" gives
 302       4 resources about λδ in the first 5 results.
 303    </li>
 304     </ul>
 305     <div class="spacer">
 306       <img class="rule" alt="[Spacer]" title="lambdadelta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
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 330     </div>
 331     <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Fri, 16 Jan 2015 16:47:03 +0100</div>
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