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22 <div class="head1">The Formal System λδ (\lambda\delta)</div>
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34 <a href="http://lambdadelta.info/index.html">home</a>
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37 <a href="http://lambdadelta.info/news.html">news</a>
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40 <a href="http://lambdadelta.info/documentation.html">documentation</a>
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43 <a href="http://lambdadelta.info/specification.html">specification</a>
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52 <a href="http://lambdadelta.info/implementation.html">implementation</a>
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60 <a href="http://lambdadelta.info/index.html#foreword">foreword</a>
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63 <a href="http://lambdadelta.info/news.html#milestones">milestones</a>
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66 <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
68 <td class="snns capitalize green">
69 <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
71 <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>
72 <td class="snnn capitalize green">
75 <td class="snns capitalize green">
76 <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
78 <td class="ssnn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</td>
81 <td class="snss capitalize sky">
82 <a href="http://lambdadelta.info/index.html#citations">citations</a>
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85 <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
87 <td class="snss capitalize orange">
88 <a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
90 <td class="snss capitalize green">
91 <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
93 <td class="snsn capitalize green">(<a href="http://lambdadelta.info/basic_1.html">core</a>)</td>
94 <td class="snsn capitalize green">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
95 <td class="snss capitalize green">
96 <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
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105 <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="bibtex">Documentation <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b4.png" />
107 <div xmlns:ld="http://lambdadelta.info/" class="text">
108 BibTeX database of λδ documentation:
109 <span class="emph alpha">download</span>
110 <a href="http://lambdadelta.info/download/lambdadelta.bib">lambdadelta.bib</a>,
111 <span class="emph alpha">view</span>
112 <a href="http://lambdadelta.info/download/lambdadelta.txt">lambdadelta.txt</a>
113 (revised <span class="emph gamma">2014-10</span>).
115 <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="v2">
116 <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b4.png" /> λδ version 2 (active)</div>
117 <div xmlns:ld="http://lambdadelta.info/" class="text">
118 The main source of information is <span class="emph alpha">J2</span>.
120 <div xmlns:ld="http://lambdadelta.info/" class="text">
121 <table cellpadding="4" cellspacing="0">
124 <td class="snns top" id="ldJ2">
125 <span class="emph alpha">J2.</span>
127 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/basic2a.pdf">The Formal System λδ Revised - Stage A: Extending the Applicability Condition</a> (<span class="emph gamma">2014-11</span>). Submitted to ACM ToCL. CoRR identifier <a href="http://arxiv.org/abs/1411.0154">1411.0154</a> [v1].</td>
130 <td class="nnns top" />
131 <td class="nsnn top">
136 <td class="snns top" id="ldR5">
137 <span class="emph alpha">R5.</span>
139 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/cie_2010.pdf">An Efficient Validation Procedure for the Formal System λδ</a> (<span class="emph alpha">2010-07</span>). In CiE 2010 Local Proceedings. University of Azores, CMATI Booklet, pp. 204-213. <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
142 <td class="nnns top" />
143 <td class="nsnn top">
148 <td class="snns top" id="ldR4">
149 <span class="emph alpha">R4.</span>
151 <td class="ssnn top">F. Guidi: <a href="http://www.informatica.unibo.it/it/ricerca/technical-report/2009/UBLCS-2009-16">Landau's "Grundlagen der Analysis" from Automath to lambda-delta</a> (<span class="emph alpha">2009-09</span>). University of Bologna, technical report UBLCS-2009-16. <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
154 <td class="nnns top" />
155 <td class="nsnn top">
160 <td class="snns top" id="ldP8">
161 <span class="emph alpha">P8.</span>
163 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_8s.pdf">The Formal System λδ and the "Three Problems"</a> (<span class="emph beta">2014-06</span>). Presentation at University of Bologna (slides).</td>
166 <td class="nnns top" />
167 <td class="nsnn top">
172 <td class="snns top" id="ldP7">
173 <span class="emph alpha">P7.</span>
175 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_7s.pdf">An Efficient Validation Procedure for the Formal System λδ</a> (<span class="emph alpha">2010-07</span>). Presentation at CiE 2010 (slides).</td>
178 <td class="nnns top" />
179 <td class="nsnn top">
184 <td class="snns top" id="ldP6">
185 <span class="emph alpha">P6.</span>
187 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_6s.pdf">A Validator for the Formal System λδ</a> (revised <span class="emph alpha">2010-02</span>). Presentation at University of Bologna (slides).</td>
190 <td class="nnns top" />
191 <td class="nsnn top">
196 <td class="snns top" id="ldV2">
197 <span class="emph alpha">V2.</span>
199 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/version_2.html">lambdadelta_2</a> (revised <span class="emph gamma">2014-10</span>). Formal specification for the proof assistant Matita 0.99.2 (scripts). <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
202 <td class="nnss top" />
203 <td class="nssn top">
210 <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="v1">
211 <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b6.png" /> λδ version 1 (superseded)</div>
212 <div xmlns:ld="http://lambdadelta.info/" class="text">
213 The main source of information is <span class="emph alpha">J1</span>.
214 A summary is available in <span class="emph alpha">P5</span>.
216 <div xmlns:ld="http://lambdadelta.info/" class="text">
217 <table cellpadding="4" cellspacing="0">
220 <td class="snns top" id="ldJ1">
221 <span class="emph alpha">J1.</span>
223 <td class="ssnn top">F. Guidi: <a href="http://doi.acm.org/10.1145/1614431.1614436">The Formal System λδ</a> (<span class="emph delta">2009-11</span>). In ACM ToCL 11(1), pp. 5:1-5:37 (<a href="http://tocl.acm.org/accepted/335guidi.pdf">accepted</a>
224 <span class="emph delta">2008-07</span>). CoRR identifier <a href="http://arxiv.org/abs/cs/0611040">cs/0611040</a> [v10] (revised <span class="emph delta">2008-09</span>). <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
227 <td class="nnns top" />
228 <td class="nsnn top">
233 <td class="snns top" id="ldR3">
234 <span class="emph alpha">R3.</span>
236 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/cie_2007.pdf">Lambda Types on the Lambda Calculus with Abbreviations</a> (<span class="emph delta">2007-06</span>). In CiE 2007 Local Proceedings. University of Siena, technical report 487, p. 387 (abstract of a presentation). <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
239 <td class="nnns top" />
240 <td class="nsnn top">
245 <td class="snns top" id="ldR2">
246 <span class="emph alpha">R2.</span>
248 <td class="ssnn top">F. Guidi: <a href="http://www.informatica.unibo.it/it/ricerca/technical-report/2006/UBLCS-2006-25">Lambda Types on the Lambda Calculus with Abbreviations</a> (<span class="emph gamma">2006-11</span>). University of Bologna, technical report UBLCS-2006-25. <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
251 <td class="nnns top" />
252 <td class="nsnn top">
257 <td class="snns top" id="ldR1">
258 <span class="emph alpha">R1.</span>
260 <td class="ssnn top">F. Guidi: <a href="http://www.informatica.unibo.it/it/ricerca/technical-report/2006/UBLCS-2006-01">Lambda Types on the Lambda Calculus with Abbreviations: a Certified Specification</a> (<span class="emph beta">2006-01</span>). University of Bologna, technical report UBLCS-2006-01. <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
263 <td class="nnns top" />
264 <td class="nsnn top">
269 <td class="snns top" id="ldP5">
270 <span class="emph alpha">P5.</span>
272 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_5s.pdf">The Formal System λδ</a> (<span class="emph delta">2008-10</span>). Presentation at Advances in Constructive Topology and Logical Foundations (slides).</td>
275 <td class="nnns top" />
276 <td class="nsnn top">
281 <td class="snns top" id="ldP4">
282 <span class="emph alpha">P4.</span>
284 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_4s.pdf">Towards the Unification of Terms, Types and Contexts</a> (<span class="emph gamma">2008-03</span>). Presentation at Types 2008 (slides).</td>
287 <td class="nnns top" />
288 <td class="nsnn top">
293 <td class="snns top" id="ldP3">
294 <span class="emph alpha">P3.</span>
296 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_3s.pdf">Lambda Types on the Lambda Calculus with Abbreviations</a> (<span class="emph gamma">2007-06</span>). Presentation at CiE 2007 (slides).</td>
299 <td class="nnns top" />
300 <td class="nsnn top">
305 <td class="snns top" id="ldP2">
306 <span class="emph alpha">P2.</span>
308 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_2s.pdf">Lambda Tipi sul Lambda Calcolo con Abbreviazioni</a> (<span class="emph gamma">2007-01</span>). Presentation at University of Padova (slides <span class="emph alpha">in Italian</span>).</td>
311 <td class="nnns top" />
312 <td class="nsnn top">
317 <td class="snns top" id="ldP1">
318 <span class="emph alpha">P1.</span>
320 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/download/ld_talk_1s.pdf">Lambda Tipi sul Lambda Calcolo con Abbreviazioni: una Specifica Certificata</a> (<span class="emph beta">2005-12</span>). Presentation at University of Bologna (slides <span class="emph alpha">in Italian</span>).</td>
323 <td class="nnns top" />
324 <td class="nsnn top">
329 <td class="snns top" id="ldV1">
330 <span class="emph alpha">V1.</span>
332 <td class="ssnn top">F. Guidi: <a href="http://lambdadelta.info/version_1.html">lambdadelta_1</a> (revised <span class="emph delta">2012-10</span>). Formal specification for the proof assistant Coq 7.3.1 (scripts). <a href="http://lambdadelta.info/documentation.html#bibtex">BibTeX entry</a>.</td>
335 <td class="nnss top" />
336 <td class="nssn top">
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