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5   <title>lambda_delta home page</title>
6   <meta content="Ferruccio Guidi" name="author">
7   <meta content="The formal system lambda_delta" name="description">
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11 <div style="text-align: center;">
12 <br>
13 <a href="http://lambda-delta.info"><img alt="[Crux Logo]"
14  title="The Crux" src="download/crux_32.png"
15  style="border: 0px solid ; width: 32px; height: 32px;"></a>
16 <h1>The Formal System λδ (lambda_delta)<br>
17 </h1>
18 <h2>Towards the unification of terms, types, environments and contexts</h2>
19 <img style="width: 95%; height: 4px;" alt="[Separator]"
20  title="Separator" src="download/rainbow.png"><br>
21 <table
22  style="text-align: left; width: 95%; margin-left: auto; margin-right: auto;"
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24   <tbody>
25     <tr>
26       <td style="vertical-align: top;">
27       <ul>
28         <li><a href="index.html">Foreword</a></li>
29       </ul>
30       <ul>
31         <li><a href="news.html">News</a></li>
32       </ul>
33       <ul>
34         <li>Papers</li>
35       </ul>
36       <ul>
37         <li><a href="implementation.html">Resources</a><br>
38         </li>
39       </ul>
40       </td>
41       <td style="vertical-align: top; text-align: left;">
42       <h3 style="text-align: right;">Documentation <img
43  style="width: 37px; height: 37px;" alt="[Butterfly]" title="Butterfly"
44  src="download/b5.png"></h3>
45 Currently the <span style="font-weight: bold;">main source of
46 information</span> on λδ (version 1) is <span
47  style="font-weight: bold;">Resource
48 1.1</span> below.<br>
49 A <span style="font-weight: bold;">summary</span> of basic λδ (version
50 1) is found in <span style="font-weight: bold;">Resource 1.5</span>
51 below.<br>
52       <h3><img style="width: 32px; height: 32px;"
53  alt="[Basic lambda_delta Logo]" title="Basic lambda_delta"
54  src="download/basic_32.png"> Basic λδ version 2 (in progress):</h3>
55       <table style="text-align: left; width: 100%;" border="0"
56  cellpadding="2" cellspacing="2">
57         <tbody>
58           <tr>
59             <td style="vertical-align: top;">2.1.<br>
60             </td>
61             <td style="vertical-align: top;">F. Guidi: <a
62  href="download/cie_2010.pdf"><span style="font-style: italic;">An
63 Efficient
64 Validation Procedure for the Formal System </span><span
65  style="font-style: italic;">λδ</span></a><span
66  style="font-style: italic;"></span>
67 (<span style="font-weight: bold;">2010-07</span>). In <span
68  style="font-style: italic;">CiE 2010 Local Proceedings</span>.
69 University of Azores, CMATI Booklet, pp. 204-213. <a
70  href="implementation.html#bibtex">BibTeX entry</a>.<br>
71             <br>
72             </td>
73           </tr>
74           <tr>
75             <td style="vertical-align: top;">2.2.<br>
76             </td>
77             <td style="vertical-align: top;"> <a name="ublcs-2009-16"></a>F.
78 Guidi:
79
80
81
82
83
84
85
86
87
88
89             <a
90  href="http://www.cs.unibo.it/pub/TR/UBLCS/ABSTRACTS/2009.bib?ncstrl.cabernet//BOLOGNA-UBLCS-2009-16"><span
91  style="font-style: italic;">Landau's
92 "Grundlagen der Analysis" from Automath to lambda-delta</span></a> (<span
93  style="font-weight: bold;">2009-09)</span>. University of
94 Bologna, technical report UBLCS-2009-16. <a
95  href="implementation.html#bibtex">BibTeX entry</a>.<br>
96             <br>
97             </td>
98           </tr>
99           <tr>
100             <td style="vertical-align: top;">2.3.<br>
101             </td>
102             <td style="vertical-align: top;">F. Guidi: <a
103  href="download/ld_talk_7s.pdf"><span style="font-style: italic;">An
104 Efficient
105 Validation Procedure for the Formal System λδ</span></a> (<span
106  style="font-weight: bold;">2010-07</span>). Presentation
107 at
108 CiE
109 2010
110 (slides).<br>
111             <br>
112             </td>
113           </tr>
114           <tr>
115             <td style="vertical-align: top;">2.4.<br>
116             </td>
117             <td style="vertical-align: top;">F. Guidi: <a
118  href="download/ld_talk_6s.pdf"><span style="font-style: italic;">A
119 Validator
120 for the Formal System λδ</span></a> (revised <span
121  style="font-weight: bold;">2010-02</span>). Presentation
122 at
123 the
124 University
125 of
126 Bologna
127 (slides). </td>
128           </tr>
129         </tbody>
130       </table>
131       <h3><img style="width: 32px; height: 32px;"
132  alt="[Basic lambda_delta Logo]" title="Basic lambda_delta"
133  src="download/basic_32.png"> Basic λδ version 1 (closed):</h3>
134       <table style="text-align: left; width: 100%;" border="0"
135  cellpadding="2" cellspacing="2">
136         <tbody>
137           <tr>
138             <td style="vertical-align: top;">1.1.<br>
139             </td>
140             <td style="vertical-align: top;"><a name="tocl1"></a>F.
141 Guidi: <a href="http://doi.acm.org/10.1145/1614431.1614436"><span
142  style="font-style: italic;">The Formal System λδ</span></a> (<span
143  style="font-weight: bold;">2009-10</span>). In ACM ToCL 11(1), Article
144 No. 5 (<a href="http://tocl.acm.org/accepted/335guidi.pdf">accepted</a>
145             <span style="font-weight: bold;">2008-07</span>). CoRR
146 identifier <a href="http://arxiv.org/abs/cs/0611040"><span
147  style="font-style: italic;"></span>cs/0611040</a> [v10] (revised <span
148  style="font-weight: bold;">2008-09</span>). <a
149  href="implementation.html#bibtex">BibTeX
150 entry</a>.<br>
151             <br>
152             </td>
153           </tr>
154           <tr>
155             <td style="vertical-align: top;">1.2.<br>
156             </td>
157             <td style="vertical-align: top;">F. Guidi: <a
158  href="download/cie_2007.pdf"><span style="font-style: italic;">Lambda
159 Types on the Lambda Calculus with
160 Abbreviations</span></a> (<span style="font-weight: bold;">2007-06</span>).
161 In
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176             <span style="font-style: italic;">CiE 2007 Local Proceedings</span>.
177 University
178 of
179 Siena,
180 technical
181 report
182 487,
183 p.
184 387
185 (abstract
186 of
187 a
188 presentation).
189
190
191
192
193
194
195
196
197             <a href="implementation.html#bibtex">BibTeX
198 entry</a>.<br>
199             <br>
200             </td>
201           </tr>
202           <tr>
203             <td style="vertical-align: top;">1.3.<br>
204             </td>
205             <td style="vertical-align: top;">F. Guidi: <a
206  href="http://www.cs.unibo.it/pub/TR/UBLCS/ABSTRACTS/2006.bib?ncstrl.cabernet//BOLOGNA-UBLCS-2006-25"><span
207  style="font-style: italic;">Lambda Types on the Lambda Calculus with
208 Abbreviations</span></a> (<span style="font-weight: bold;">2006-11</span>).
209 University
210 of
211 Bologna,
212 technical
213 report
214 UBLCS-2006-25.
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230             <a href="implementation.html#bibtex">BibTeX
231 entry</a>.<br>
232             <br>
233             </td>
234           </tr>
235           <tr>
236             <td style="vertical-align: top;">1.4.<br>
237             </td>
238             <td style="vertical-align: top;">F. Guidi: <a
239  style="font-style: italic;"
240  href="http://www.cs.unibo.it/pub/TR/UBLCS/ABSTRACTS/2006.bib?ncstrl.cabernet//BOLOGNA-UBLCS-2006-01">Lambda
241 Types
242 on
243 the
244 Lambda
245 Calculus
246 with
247 Abbreviations:
248 a
249 Certified
250 Specification</a> (<span style="font-weight: bold;">2006-01</span>).
251 University of
252 Bologna, technical report UBLCS-2006-01. <a
253  href="implementation.html#bibtex">BibTeX entry</a>.<br>
254             <br>
255             </td>
256           </tr>
257           <tr>
258             <td style="vertical-align: top;">1.5.<br>
259             </td>
260             <td style="vertical-align: top;">F. Guidi: <a
261  style="font-style: italic;" href="download/ld_talk_5s.pdf">The
262 Formal
263 System lambda-delta</a>
264 (<span style="font-weight: bold;">2008-10</span>). Presentation at
265 "Advances in Constructive Topology and Logical Foundations" (slides).<br>
266             <br>
267             </td>
268           </tr>
269           <tr>
270             <td style="vertical-align: top;">1.6.<br>
271             </td>
272             <td style="vertical-align: top;">F. Guidi: <a
273  href="download/ld_talk_4s.pdf"><span style="font-style: italic;">Towards
274 the Unification of Terms, Types
275 and Contexts</span></a> (<span style="font-weight: bold;">2008-03</span>).
276 Presentation
277 at
278 Types
279 2008
280 (slides).<br>
281             <br>
282             </td>
283           </tr>
284           <tr>
285             <td style="vertical-align: top;">1.7.<br>
286             </td>
287             <td style="vertical-align: top;">F. Guidi: <a
288  href="download/ld_talk_3s.pdf"><span style="font-style: italic;">Lambda
289 Types on the Lambda Calculus with
290 Abbreviations</span></a> (<span style="font-weight: bold;">2007-06</span>).
291 Presentation
292 at
293 CiE
294 2007
295 (slides).<br>
296             <br>
297             </td>
298           </tr>
299           <tr>
300             <td style="vertical-align: top;">1.8.<br>
301             </td>
302             <td style="vertical-align: top;">F. Guidi: <a
303  href="download/ld_talk_2s.pdf"><span style="font-style: italic;">Lambda
304 Tipi sul Lambda Calcolo con
305 Abbreviazioni</span></a> (<span style="font-weight: bold;">2007-01</span>).
306 Presentation
307 at
308 the
309 University
310 of
311 Padova
312 (slides
313
314
315
316
317
318
319
320
321             <span style="font-weight: bold;">in
322 Italian</span>).<br>
323             <br>
324             </td>
325           </tr>
326           <tr>
327             <td style="vertical-align: top;">1.9.<br>
328             </td>
329             <td style="vertical-align: top;"><a name="bologna1"></a>F.
330 Guidi: <a href="download/ld_talk_1s.pdf"><span
331  style="font-style: italic;">Lambda Tipi sul Lambda Calcolo con
332 Abbreviazioni: una Specifica Certificata</span></a> (<span
333  style="font-weight: bold;">2005-12</span>). Presentation at
334 the University of Bologna (slides <span style="font-weight: bold;">in
335 Italian</span>).<br>
336             </td>
337           </tr>
338         </tbody>
339       </table>
340       </td>
341     </tr>
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