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- <div class="head1">The Formal System λδ (\lambda\delta)</div>
+ <div class="head1">The Formal Systems of the λδ (\lambda\delta) Family</div>
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<a href="http://lambdadelta.info/news.html">news</a>
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- <td class="snns capitalize italic orange">
- <a href="http://lambdadelta.info/documentation.html">documentation</a>
- </td>
- <td class="snns capitalize italic green">
+ <td class="snns capitalize italic white">
<a href="http://lambdadelta.info/specification.html">specification</a>
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+ <td class="snnn capitalize italic white">
<br />
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- <td class="snnn capitalize italic green">
+ <td class="snnn capitalize italic white">
<br />
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+ <td class="snns capitalize italic orange">
+ <a href="http://lambdadelta.info/documentation.html">documentation</a>
+ </td>
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<a href="http://lambdadelta.info/implementation.html">implementation</a>
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<td class="snns capitalize magenta">
<a href="http://lambdadelta.info/news.html#milestones">milestones</a>
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- <td class="snns capitalize orange">
- <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
- </td>
- <td class="snns capitalize green">
+ <td class="snns capitalize white">
<a href="http://lambdadelta.info/specification.html#v2">version 2</a>
</td>
- <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>
- <td class="snnn capitalize green">
+ <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>
+ <td class="snnn capitalize white">
<br />
</td>
+ <td class="snns capitalize orange">
+ <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
+ </td>
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<a href="http://lambdadelta.info/implementation.html#lddl">library</a>
</td>
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<a href="http://lambdadelta.info/news.html#visibility">visibility</a>
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+ <td class="snss capitalize white">
+ <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
+ </td>
+ <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>
+ <td class="snsn capitalize white">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
<td class="snss capitalize orange">
<a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
</td>
- <td class="snss capitalize green">
- <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
- </td>
- <td class="snsn capitalize green">(<a href="http://lambdadelta.info/ground_1.html">background</a> - <a href="http://lambdadelta.info/basic_1.html">core</a>)</td>
- <td class="snsn capitalize green">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
<td class="snss capitalize green">
<a href="http://lambdadelta.info/implementation.html#helena">helena</a>
</td>
<img class="icon32" alt="[Crux logo]" title="the Crux" src="http://lambdadelta.info/images/crux_32.png" /> λδ Digital Library (LDDL)</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
The λδ Digital Library is part of <a href="http://helm.cs.unibo.it/">HELM</a>
- and contains resources expressed in λδ.
+ and contains resources expressed in the systems of the λδ family.
</div>
<ul xmlns:ld="http://lambdadelta.info/" id="contents">
<li>
<div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="helena">
<img class="icon32" alt="[Helena logo]" title="Helena" src="http://lambdadelta.info/images/helena_32.png" /> Helena</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
- Helena is a processor for λδ,
+ Helena is a processor for the systems of the λδ family,
implemented in <a href="http://caml.inria.fr/">Caml</a>
as a part of the <a href="http://helm.cs.unibo.it/">HELM</a> software,
- meant for testing the stable features of the calculus as well as the unstable ones.
+ meant for testing both their stable and unstable features.
</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
The processor source code is available in the directory
of the <a href="http://helm.cs.unibo.it/software/index.html">HELM Svn repository</a>.
The Svn revisions containing the stable versions of Helena are indicated next.
</div>
+ <ul xmlns:ld="http://lambdadelta.info/" id="v3">
+ <li>
+ <span class="emph gamma">Version 0.8.3 (2015-12).</span>
+ Supports exportation to λProlog
+ (two formats for ELPI,
+ and two formats for <a href="http://teyjus.cs.umn.edu/">Teyjus</a>).
+ Employs optimized conditional compilation through
+ <a href="http://camlp5.gforge.inria.fr/">camlp5</a> code preprocessor (pa_macro)
+ to reduce a performance loss, which is expected to disappear
+ by employing a different code preprocessor.
+ Overall validation speed of the "Grundlagen der Analysis" with respect to version 0.8.2:
+ +3% with optimized compilation, +5% without optimized compilation.
+ [Svn revision: 13108] (<a href="http://lambdadelta.info/download/helena_0.8.3.tar.gz">archived source code</a>).
+ <ul>
+ <li>
+ <span class="emph gamma">2015-06.</span>
+ The corrected specification of Landau's "Grundlagen der Analysis"
+ is successfully validated in a λProlog implementation of λδ version 3.
+ </li>
+ </ul>
+ </li>
+ </ul>
<ul xmlns:ld="http://lambdadelta.info/" id="v2">
<li>
<span class="emph gamma">Version 0.8.2 (2015-02).</span>
- Uses λδ "Version 3" with layer variables as core language.
+ Uses λδ version 3 with layer variables as core language.
Supports exportation to Gallina
(the specification language of <a href="http://coq.inria.fr/">Coq</a>),
and to Grafite
<li>
<span class="emph gamma">2015-02.</span>
The translated specification of Landau's "Grundlagen der Analysis"
- is successfully validated in
λC by <a href="http://coq.inria.fr/">Coq 8.4.3</a>.
+ is successfully validated in
CC by <a href="http://coq.inria.fr/">Coq 8.4.3</a>.
</li>
<li>
<span class="emph gamma">2014-12.</span>
The corrected specification of Landau's "Grundlagen der Analysis"
- is successfully validated in λδ "Version 3".
+ is successfully validated in λδ version 3.
</li>
</ul>
</li>
<ul xmlns:ld="http://lambdadelta.info/" id="v1">
<li>
<span class="emph beta">Version 0.8.1 (2010-11).</span>
- Uses a subset of λδ "Version 4" as intermediate language.
+ Uses a subset of λδ version 4 as intermediate language.
Features importation from ".hln" files containing λδ textual syntax.
The overall validation speed of the "Grundlagen der Analysis"
increases of 22% with respect to version 0.8.0.
<ul xmlns:ld="http://lambdadelta.info/" id="v0">
<li>
<span class="emph beta">Version 0.8.0 (2009-09).</span>
- Supports λδ "Version 2" with naive implementation of impredicative sort inclusion.
+ Supports λδ version 2 with naive implementation of impredicative sort inclusion.
Features importation from <a href="http://www.win.tue.nl/automath/">Automath</a>
and exportation to <a href="http://www.w3.org/XML/">XML</a>.
<a href="http://lambdadelta.info/documentation.html#ldR2a">Documentation (R2a)</a>.
<div xmlns:ld="http://lambdadelta.info/" class="spacer">
<br />
</div>
- <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Fri, 06 Mar 2015 16:17:54 +0100</div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Sat, 23 Jan 2016 00:45:18 +0100</div>
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projects / helm.git / blobdiff