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/home.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/home.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#helena">helena</a>
  77             </td>
  78             <td class="ssnn capitalize green">
  79               <a href="http://lambdadelta.info/osn/">Open Symbolic Notation (OSN)</a>
  80             </td>
  81           </tr>
  82           <tr>
  83             <td class="snss capitalize sky">
  84               <a href="http://lambdadelta.info/home.html#citations">citations</a>
  85             </td>
  86             <td class="snss capitalize magenta">
  87               <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
  88             </td>
  89             <td class="snss capitalize white">
  90               <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
  91             </td>
  92             <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>
  93             <td class="snsn capitalize white">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
  94             <td class="snss capitalize orange">
  95               <a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
  96             </td>
  97             <td class="snss capitalize green">
  98               <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
  99             </td>
 100             <td class="sssn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</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="[butterfly]" title="\lambda\delta butterfly" src="http://lambdadelta.info/images/b3.png" />
 107     </div>
 108     <ul xmlns:ld="http://lambdadelta.info/">
 109       <li>
 110         <span class="emph alpha">December 2015.</span>
 111         <a href="http://lambdadelta.info/documentation.html#ldJ3a">Second journal paper on λδ</a>
 112       accepted for publication.
 113    </li>
 114     </ul>
 115     <ul xmlns:ld="http://lambdadelta.info/">
 116       <li>
 117         <span class="emph gamma">December 2015.</span>
 118         <a href="http://lambdadelta.info/implementation.html#v3">"Helena 0.8.3"</a> is released.
 119    </li>
 120     </ul>
 121     <ul xmlns:ld="http://lambdadelta.info/">
 122       <li>
 123         <span class="emph delta">August 2015.</span>
 124       The specification of λδ version 2A1 is concluded.
 125    </li>
 126     </ul>
 127     <ul xmlns:ld="http://lambdadelta.info/">
 128       <li>
 129         <span class="emph gamma">June 2015.</span>
 130       The corrected specification of Landau's "Grundlagen der Analysis"
 131       is validated in a λProlog implementation of λδ version 3.
 132    </li>
 133     </ul>
 134     <ul xmlns:ld="http://lambdadelta.info/">
 135       <li>
 136         <span class="emph delta">March 2015.</span>
 137       The specification of λδ version 1 is validated by
 138       <a href="http://matita.cs.unibo.it/">Matita 0.99.2</a>.
 139    </li>
 140     </ul>
 141     <ul xmlns:ld="http://lambdadelta.info/">
 142       <li>
 143         <span class="emph gamma">February 2015.</span>
 144         <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is updated.
 145       <ul>
 146           <li class="">
 147          The translated specification of Landau's "Grundlagen der Analysis"
 148          is validated in CC by <a href="http://coq.inria.fr/">Coq 8.4.3</a>.
 149       </li>
 150         </ul>
 151       </li>
 152     </ul>
 153     <ul xmlns:ld="http://lambdadelta.info/">
 154       <li>
 155         <span class="emph delta">January 2015.</span>
 156       The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
 157       is updated with backports from the abandoned specification of λδ version 2.
 158    </li>
 159     </ul>
 160     <ul xmlns:ld="http://lambdadelta.info/">
 161       <li>
 162         <span class="emph gamma">December 2014.</span>
 163         <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is released.
 164       <ul>
 165           <li class="">
 166          The corrected specification of Landau's "Grundlagen der Analysis"
 167          is validated in λδ version 3.
 168       </li>
 169         </ul>
 170       </li>
 171     </ul>
 172     <ul xmlns:ld="http://lambdadelta.info/">
 173       <li>
 174         <span class="emph gamma">October 2014.</span>
 175         <a href="http://lambdadelta.info/documentation.html#ldJ2a">λδ version 2A1</a>
 176       is released.
 177    </li>
 178     </ul>
 179     <ul xmlns:ld="http://lambdadelta.info/">
 180       <li>
 181         <span class="emph beta">July 2014.</span>
 182       A new version of this site is online.
 183    </li>
 184     </ul>
 185     <ul xmlns:ld="http://lambdadelta.info/">
 186       <li>
 187         <span class="emph beta">June 2014.</span>
 188         <a href="http://lambdadelta.info/documentation.html#ldP2c">First communication on λδ version 2.</a>
 189       </li>
 190     </ul>
 191     <ul xmlns:ld="http://lambdadelta.info/">
 192       <li>
 193         <span class="emph alpha">December 2012.</span>
 194       The character "_" is removed from the denomination "lambda_delta":
 195       <ul>
 196           <li class="">
 197          The denomination "\lambda\delta" is used in λδ-related texts.
 198       </li>
 199           <li class="">
 200          The denomination "lambdadelta" is used in λδ-related identifiers.
 201       </li>
 202           <li class="">
 203          Permanent λδ URL acquired:
 204          <a href="http://lambdadelta.info/">http://lambdadelta.info/</a>
 205          (pointing at this site).
 206       </li>
 207         </ul>
 208       </li>
 209     </ul>
 210     <ul xmlns:ld="http://lambdadelta.info/">
 211       <li>
 212         <span class="emph alpha">September 2011.</span>
 213       The denomination "lambda-delta" changes to "lambda_delta":
 214       <ul>
 215           <li class="">
 216          The character "-" is reserved in λδ textual syntax
 217          (recognized by "Helena 0.8.1").
 218       </li>
 219           <li class="">
 220          Eventually, the occurrences of the character "-"
 221          will be replaced by "_" in all λδ-related identifiers.
 222       </li>
 223           <li class="">
 224          In particular, this refactoring involves file names and path names.
 225       </li>
 226         </ul>
 227       </li>
 228     </ul>
 229     <ul xmlns:ld="http://lambdadelta.info/">
 230       <li>
 231         <span class="emph alpha">April 2011.</span>
 232       The specification of <a href="http://lambdadelta.info/specification.html#v2">λδ version 2</a>
 233       and related topics is restarted in
 234       <a href="http://matita.cs.unibo.it/">Matita 0.5</a>.
 235    </li>
 236     </ul>
 237     <ul xmlns:ld="http://lambdadelta.info/">
 238       <li>
 239         <span class="emph delta">February 2011.</span>
 240       The specification of λδ version 2 with Coq 7.3.1 is abandoned.
 241    </li>
 242     </ul>
 243     <ul xmlns:ld="http://lambdadelta.info/">
 244       <li>
 245         <span class="emph alpha">December 2010.</span>
 246       Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
 247    </li>
 248     </ul>
 249     <ul xmlns:ld="http://lambdadelta.info/">
 250       <li>
 251         <span class="emph beta">November 2010.</span>
 252         <a href="http://lambdadelta.info/implementation.html#v1">"Helena 0.8.1"</a> is released.
 253    </li>
 254     </ul>
 255     <ul xmlns:ld="http://lambdadelta.info/">
 256       <li>
 257         <span class="emph beta">September 2009.</span>
 258         <a href="http://lambdadelta.info/implementation.html#v0">"Helena 0.8.0"</a> is released and the
 259       <a href="http://lambdadelta.info/implementation.html#lddl">λδ Digital Library</a> is started.
 260    </li>
 261     </ul>
 262     <ul xmlns:ld="http://lambdadelta.info/">
 263       <li>
 264         <span class="emph alpha">June 2009.</span>
 265       "Helena", a <a href="http://lambdadelta.info/implementation.html#helena">validator for λδ version 2</a>,
 266       is available as a part of the <a href="http://helm.cs.unibo.it/">HELM</a> software.
 267    </li>
 268     </ul>
 269     <ul xmlns:ld="http://lambdadelta.info/">
 270       <li>
 271         <span class="emph alpha">September 2008.</span>
 272       This site is online.
 273    </li>
 274     </ul>
 275     <ul xmlns:ld="http://lambdadelta.info/">
 276       <li>
 277         <span class="emph delta">July 2008.</span>
 278         <a href="http://lambdadelta.info/documentation.html#ldJ1a">First journal paper on λδ</a>
 279       accepted for publication.
 280    </li>
 281     </ul>
 282     <ul xmlns:ld="http://lambdadelta.info/">
 283       <li>
 284         <span class="emph delta">July 2008.</span>
 285       First <a href="http://helm.cs.unibo.it/procedural/">procedural reconstruction</a>
 286       for <a href="http://matita.cs.unibo.it/">Matita 0.5</a>
 287       of the λδ version 1 for Coq 7.3.1.
 288    </li>
 289     </ul>
 290     <ul xmlns:ld="http://lambdadelta.info/">
 291       <li>
 292         <span class="emph delta">June 2008.</span>
 293       The <a href="http://lambdadelta.info/specification.html#static1">
 294          HTML pages of the specification of λδ version 1 for Matita 0.5</a>
 295       are online.
 296    </li>
 297     </ul>
 298     <ul xmlns:ld="http://lambdadelta.info/">
 299       <li>
 300         <span class="emph delta">May 2008.</span>
 301       The specification of λδ version 1 is concluded.
 302    </li>
 303     </ul>
 304     <ul xmlns:ld="http://lambdadelta.info/">
 305       <li>
 306         <span class="emph alpha">March 2008.</span>
 307       The specification of λδ version 2 is started with Coq 7.3.1 (false start).
 308    </li>
 309     </ul>
 310     <ul xmlns:ld="http://lambdadelta.info/">
 311       <li>
 312         <span class="emph gamma">September 2007.</span>
 313       The <a href="http://lambdadelta.info/specification.html#dynamic1">
 314          specification of λδ version 1 for Matita 0.4</a>
 315       is online.
 316    </li>
 317     </ul>
 318     <ul xmlns:ld="http://lambdadelta.info/">
 319       <li>
 320         <span class="emph gamma">November 2006.</span>
 321         <a href="http://lambdadelta.info/documentation.html#ldR1b">λδ version 1</a>
 322       is released.
 323    </li>
 324     </ul>
 325     <ul xmlns:ld="http://lambdadelta.info/">
 326       <li>
 327         <span class="emph beta">December 2005.</span>
 328         <a href="http://lambdadelta.info/documentation.html#ldP1a">First communication on λδ version 1</a>.
 329    </li>
 330     </ul>
 331     <ul xmlns:ld="http://lambdadelta.info/">
 332       <li>
 333         <span class="emph alpha">May 2004.</span>
 334       The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
 335       is started with Coq 7.3.1.
 336    </li>
 337     </ul>
 338     <!-- ===================================================================== -->
 339     <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="visibility">Visibility <img class="icon37" alt="[butterfly]" title="\lambda\delta butterfly" src="http://lambdadelta.info/images/b3.png" />
 340     </div>
 341     <ul xmlns:ld="http://lambdadelta.info/">
 342       <li>
 343         <span class="emph alpha">June 2014.</span>
 344       The <a href="http://www.google.com/">Google</a>
 345       search for "formal system lambda delta" gives
 346       5 resources about the λδ family in the first 6 results.
 347    </li>
 348     </ul>
 349     <ul xmlns:ld="http://lambdadelta.info/">
 350       <li>
 351         <span class="emph alpha">June 2014.</span>
 352       The <a href="http://www.yahoo.com/">Yahoo</a>
 353       search for "formal system lambda delta" gives
 354       4 resources about the λδ family in the first 5 results.
 355    </li>
 356     </ul>
 357     <div class="spacer">
 358       <img class="rule" alt="[Spacer]" title="\lambda\delta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
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 360     <div xmlns:ld="http://lambdadelta.info/" class="spacer">
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 382     </div>
 383     <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Fri, 24 Nov 2017 21:00:00 +0100</div>
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