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 Systems of the λδ (\lambda\delta) Family</div>
  23     <div class="spacer">
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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 white">
  40               <a href="http://lambdadelta.info/specification.html">specification</a>
  41             </td>
  42             <td class="snnn capitalize italic white">
  43               <br />
  44             </td>
  45             <td class="snnn capitalize italic white">
  46               <br />
  47             </td>
  48             <td class="snns capitalize italic orange">
  49               <a href="http://lambdadelta.info/documentation.html">documentation</a>
  50             </td>
  51             <td class="snns capitalize italic green">
  52               <a href="http://lambdadelta.info/implementation.html">implementation</a>
  53             </td>
  54             <td class="ssnn capitalize italic green">
  55               <br />
  56             </td>
  57           </tr>
  58           <tr>
  59             <td class="snns capitalize sky">
  60               <a href="http://lambdadelta.info/index.html#foreword">foreword</a>
  61             </td>
  62             <td class="snns capitalize magenta">
  63               <a href="http://lambdadelta.info/news.html#milestones">milestones</a>
  64             </td>
  65             <td class="snns capitalize white">
  66               <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
  67             </td>
  68             <td class="snnn capitalize white">(<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="snnn capitalize white">
  70               <br />
  71             </td>
  72             <td class="snns capitalize orange">
  73               <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
  74             </td>
  75             <td class="snns capitalize green">
  76               <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
  77             </td>
  78             <td class="ssnn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</td>
  79           </tr>
  80           <tr>
  81             <td class="snss capitalize sky">
  82               <a href="http://lambdadelta.info/index.html#citations">citations</a>
  83             </td>
  84             <td class="snss capitalize magenta">
  85               <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
  86             </td>
  87             <td class="snss capitalize white">
  88               <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
  89             </td>
  90             <td class="snsn capitalize white">(<a href="http://lambdadelta.info/ground_1.html">background</a> - <a href="http://lambdadelta.info/basic_1.html">core</a>)</td>
  91             <td class="snsn capitalize white">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
  92             <td class="snss capitalize orange">
  93               <a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
  94             </td>
  95             <td class="snss capitalize green">
  96               <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
  97             </td>
  98             <td class="sssn capitalize green">
  99               <br />
 100             </td>
 101           </tr>
 102         </tbody>
 103       </table>
 104     </div>
 105     <!-- ===================================================================== -->
 106     <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" />
 107     </div>
 108     <ul xmlns:ld="http://lambdadelta.info/">
 109       <li>
 110         <span class="emph gamma">December 2015.</span>
 111         <a href="http://lambdadelta.info/implementation.html#v3">"Helena 0.8.3"</a> is released.
 112    </li>
 113     </ul>
 114     <ul xmlns:ld="http://lambdadelta.info/">
 115       <li>
 116         <span class="emph delta">August 2015.</span>
 117       The specification of λδ version 2A1 is concluded.
 118    </li>
 119     </ul>
 120     <ul xmlns:ld="http://lambdadelta.info/">
 121       <li>
 122         <span class="emph gamma">June 2015.</span>
 123       The corrected specification of Landau's "Grundlagen der Analysis"
 124       is validated in a λProlog implementation of λδ version 3.
 125    </li>
 126     </ul>
 127     <ul xmlns:ld="http://lambdadelta.info/">
 128       <li>
 129         <span class="emph delta">March 2015.</span>
 130       The specification of λδ version 1 is validated by
 131       <a href="http://matita.cs.unibo.it/">Matita 0.99.2</a>.
 132    </li>
 133     </ul>
 134     <ul xmlns:ld="http://lambdadelta.info/">
 135       <li>
 136         <span class="emph gamma">February 2015.</span>
 137         <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is updated.
 138       <ul>
 139           <li>
 140          The translated specification of Landau's "Grundlagen der Analysis"
 141          is validated in CC by <a href="http://coq.inria.fr/">Coq 8.4.3</a>.
 142       </li>
 143         </ul>
 144       </li>
 145     </ul>
 146     <ul xmlns:ld="http://lambdadelta.info/">
 147       <li>
 148         <span class="emph delta">January 2015.</span>
 149       The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
 150       is updated with backports from the abandoned specification of λδ version 2.
 151    </li>
 152     </ul>
 153     <ul xmlns:ld="http://lambdadelta.info/">
 154       <li>
 155         <span class="emph gamma">December 2014.</span>
 156         <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is released.
 157       <ul>
 158           <li>
 159          The corrected specification of Landau's "Grundlagen der Analysis"
 160          is validated in λδ version 3.
 161       </li>
 162         </ul>
 163       </li>
 164     </ul>
 165     <ul xmlns:ld="http://lambdadelta.info/">
 166       <li>
 167         <span class="emph gamma">October 2014.</span>
 168         <a href="http://lambdadelta.info/documentation.html#ldJ2a">λδ version 2A1</a>
 169       is released.
 170    </li>
 171     </ul>
 172     <ul xmlns:ld="http://lambdadelta.info/">
 173       <li>
 174         <span class="emph beta">July 2014.</span>
 175       A new version of this site is online.
 176    </li>
 177     </ul>
 178     <ul xmlns:ld="http://lambdadelta.info/">
 179       <li>
 180         <span class="emph beta">June 2014.</span>
 181         <a href="http://lambdadelta.info/documentation.html#ldP2c">First communication on λδ version 2.</a>
 182       </li>
 183     </ul>
 184     <ul xmlns:ld="http://lambdadelta.info/">
 185       <li>
 186         <span class="emph alpha">December 2012.</span>
 187       The character "_" is removed from the denomination "lambda_delta":
 188       <ul>
 189           <li>
 190          The denomination "\lambda\delta" is used in λδ-related texts.
 191       </li>
 192           <li>
 193          The denomination "lambdadelta" is used in λδ-related identifiers.
 194       </li>
 195           <li>
 196          Permanent λδ URL acquired:
 197          <a href="http://lambdadelta.info/">http://lambdadelta.info/</a>
 198          (pointing at this site).
 199       </li>
 200         </ul>
 201       </li>
 202     </ul>
 203     <ul xmlns:ld="http://lambdadelta.info/">
 204       <li>
 205         <span class="emph alpha">September 2011.</span>
 206       The denomination "lambda-delta" changes to "lambda_delta":
 207       <ul>
 208           <li>
 209          The character "-" is reserved in λδ textual syntax
 210          (recognized by "Helena 0.8.1").
 211       </li>
 212           <li>
 213          Eventually, the occurrences of the character "-"
 214          will be replaced by "_" in all λδ-related identifiers.
 215       </li>
 216           <li>
 217          In particular, this refactoring involves file names and path names.
 218       </li>
 219         </ul>
 220       </li>
 221     </ul>
 222     <ul xmlns:ld="http://lambdadelta.info/">
 223       <li>
 224         <span class="emph alpha">April 2011.</span>
 225       The specification of <a href="http://lambdadelta.info/specification.html#v2">λδ version 2</a>
 226       and related topics is restarted in
 227       <a href="http://matita.cs.unibo.it/">Matita 0.5</a>.
 228    </li>
 229     </ul>
 230     <ul xmlns:ld="http://lambdadelta.info/">
 231       <li>
 232         <span class="emph delta">February 2011.</span>
 233       The specification of λδ version 2 with Coq 7.3.1 is abandoned.
 234    </li>
 235     </ul>
 236     <ul xmlns:ld="http://lambdadelta.info/">
 237       <li>
 238         <span class="emph alpha">December 2010.</span>
 239       Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
 240    </li>
 241     </ul>
 242     <ul xmlns:ld="http://lambdadelta.info/">
 243       <li>
 244         <span class="emph beta">November 2010.</span>
 245         <a href="http://lambdadelta.info/implementation.html#v1">"Helena 0.8.1"</a> is released.
 246    </li>
 247     </ul>
 248     <ul xmlns:ld="http://lambdadelta.info/">
 249       <li>
 250         <span class="emph beta">September 2009.</span>
 251         <a href="http://lambdadelta.info/implementation.html#v0">"Helena 0.8.0"</a> is released and the
 252       <a href="http://lambdadelta.info/implementation.html#lddl">λδ Digital Library</a> is started.
 253    </li>
 254     </ul>
 255     <ul xmlns:ld="http://lambdadelta.info/">
 256       <li>
 257         <span class="emph alpha">June 2009.</span>
 258       "Helena", a <a href="http://lambdadelta.info/implementation.html#helena">validator for λδ version 2</a>,
 259       is available as a part of the <a href="http://helm.cs.unibo.it/">HELM</a> software.
 260    </li>
 261     </ul>
 262     <ul xmlns:ld="http://lambdadelta.info/">
 263       <li>
 264         <span class="emph alpha">September 2008.</span>
 265       This site is online.
 266    </li>
 267     </ul>
 268     <ul xmlns:ld="http://lambdadelta.info/">
 269       <li>
 270         <span class="emph delta">July 2008.</span>
 271         <a href="http://lambdadelta.info/documentation.html#ldJ1a">First journal paper on λδ</a>
 272       accepted for publication.
 273    </li>
 274     </ul>
 275     <ul xmlns:ld="http://lambdadelta.info/">
 276       <li>
 277         <span class="emph delta">July 2008.</span>
 278       First <a href="http://helm.cs.unibo.it/procedural/">procedural reconstruction</a>
 279       for <a href="http://matita.cs.unibo.it/">Matita 0.5</a>
 280       of the λδ version 1 for Coq 7.3.1.
 281    </li>
 282     </ul>
 283     <ul xmlns:ld="http://lambdadelta.info/">
 284       <li>
 285         <span class="emph delta">June 2008.</span>
 286       The <a href="http://lambdadelta.info/specification.html#static1">
 287          HTML pages of the specification of λδ version 1 for Matita 0.5</a>
 288       are online.
 289    </li>
 290     </ul>
 291     <ul xmlns:ld="http://lambdadelta.info/">
 292       <li>
 293         <span class="emph delta">May 2008.</span>
 294       The specification of λδ version 1 is concluded.
 295    </li>
 296     </ul>
 297     <ul xmlns:ld="http://lambdadelta.info/">
 298       <li>
 299         <span class="emph alpha">March 2008.</span>
 300       The specification of λδ version 2 is started with Coq 7.3.1 (false start).
 301    </li>
 302     </ul>
 303     <ul xmlns:ld="http://lambdadelta.info/">
 304       <li>
 305         <span class="emph gamma">September 2007.</span>
 306       The <a href="http://lambdadelta.info/specification.html#dynamic1">
 307          specification of λδ version 1 for Matita 0.4</a>
 308       is online.
 309    </li>
 310     </ul>
 311     <ul xmlns:ld="http://lambdadelta.info/">
 312       <li>
 313         <span class="emph gamma">November 2006.</span>
 314         <a href="http://lambdadelta.info/documentation.html#ldR1b">λδ version 1</a>
 315       is released.
 316    </li>
 317     </ul>
 318     <ul xmlns:ld="http://lambdadelta.info/">
 319       <li>
 320         <span class="emph beta">December 2005.</span>
 321         <a href="http://lambdadelta.info/documentation.html#ldP1a">First communication on λδ version 1</a>.
 322    </li>
 323     </ul>
 324     <ul xmlns:ld="http://lambdadelta.info/">
 325       <li>
 326         <span class="emph alpha">May 2004.</span>
 327       The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
 328       is started with Coq 7.3.1.
 329    </li>
 330     </ul>
 331     <!-- ===================================================================== -->
 332     <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" />
 333     </div>
 334     <ul xmlns:ld="http://lambdadelta.info/">
 335       <li>
 336         <span class="emph alpha">June 2014.</span>
 337       The <a href="http://www.google.com/">Google</a>
 338       search for "formal system lambda delta" gives
 339       5 resources about the λδ family in the first 6 results.
 340    </li>
 341     </ul>
 342     <ul xmlns:ld="http://lambdadelta.info/">
 343       <li>
 344         <span class="emph alpha">June 2014.</span>
 345       The <a href="http://www.yahoo.com/">Yahoo</a>
 346       search for "formal system lambda delta" gives
 347       4 resources about the λδ family in the first 5 results.
 348    </li>
 349     </ul>
 350     <div class="spacer">
 351       <img class="rule" alt="[Spacer]" title="lambdadelta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
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 353     <div xmlns:ld="http://lambdadelta.info/" class="spacer">
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 375     </div>
 376     <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Wed, 30 Dec 2015 15:33:02 +0100</div>
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