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19 <img class="icon32" alt="[\lambda\delta home]" title="\lambda\delta home" src="http://lambdadelta.info/images/crux_32.png" />
22 <div class="head1">cic:/matita/lambdadelta/basic_2/ (core λδ version 2)</div>
24 <img class="rule" alt="[Spacer]" title="\lambda\delta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
26 <div xmlns:ld="http://lambdadelta.info/" class="spacer">
29 <div xmlns:ld="http://lambdadelta.info/" class="text">
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33 <td class="snns capitalize italic sky">
34 <a href="http://lambdadelta.info/home.html">home</a>
36 <td class="snns capitalize italic magenta">
37 <a href="http://lambdadelta.info/news.html">news</a>
39 <td class="snns capitalize italic white">
40 <a href="http://lambdadelta.info/specification.html">specification</a>
42 <td class="snnn capitalize italic white">
45 <td class="snnn capitalize italic white">
48 <td class="snns capitalize italic orange">
49 <a href="http://lambdadelta.info/documentation.html">documentation</a>
51 <td class="snns capitalize italic green">
52 <a href="http://lambdadelta.info/implementation.html">implementation</a>
54 <td class="ssnn capitalize italic green">
59 <td class="snns capitalize sky">
60 <a href="http://lambdadelta.info/home.html#foreword">foreword</a>
62 <td class="snns capitalize magenta">
63 <a href="http://lambdadelta.info/news.html#milestones">milestones</a>
65 <td class="snns capitalize white">
66 <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
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">
72 <td class="snns capitalize orange">
73 <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
75 <td class="snns capitalize green">
76 <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
78 <td class="ssnn capitalize green">
79 <a href="http://lambdadelta.info/osn/">Open Symbolic Notation (OSN)</a>
83 <td class="snss capitalize sky">
84 <a href="http://lambdadelta.info/home.html#citations">citations</a>
86 <td class="snss capitalize magenta">
87 <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
89 <td class="snss capitalize white">
90 <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
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>
97 <td class="snss capitalize green">
98 <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
100 <td class="sssn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</td>
106 <section>System's Syntax and Behavior</section>
107 <body>This is a summary of the "block structure"
108 of the System's syntactic items and reductions.
110 <table name="basic_2_blk"/>
111 <body>* In terms only.
112 ** In terms and local environments only.
113 *** In global environments only.
114 **** Sort level k in terms only.
117 <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="summary">Summary of the Specification <img class="icon37" alt="[butterfly]" title="\lambda\delta butterfly" src="http://lambdadelta.info/images/b4.png" />
119 <div xmlns:ld="http://lambdadelta.info/" class="text">Here is a numerical account of the specification's contents
122 <div xmlns:ld="http://lambdadelta.info/" class="text">
123 <table cellpadding="4" cellspacing="0">
126 <td class="snns capitalize italic gray">category</td>
127 <td class="snns italic gray">objects</td>
128 <td class="snnn right italic gray">
131 <td class="snnn italic gray">
134 <td class="snnn right italic gray">
137 <td class="snnn italic gray">
140 <td class="ssnn right italic gray">
145 <td class="snns capitalize italic cyan">sizes</td>
146 <td class="snns italic cyan">files</td>
147 <td class="snnn right italic cyan">221</td>
148 <td class="snns italic cyan">characters</td>
149 <td class="snnn right italic cyan">212361</td>
150 <td class="snns italic cyan">nodes</td>
151 <td class="ssnn right italic cyan">1046022</td>
154 <td class="snns capitalize italic green">propositions</td>
155 <td class="snns italic green">theorems</td>
156 <td class="snnn right italic green">49</td>
157 <td class="snns italic green">lemmas</td>
158 <td class="snnn right italic green">691</td>
159 <td class="snns italic green">total</td>
160 <td class="ssnn right italic green">740</td>
163 <td class="snss capitalize italic yellow">concepts</td>
164 <td class="snss italic yellow">declared</td>
165 <td class="snsn right italic yellow">29</td>
166 <td class="snss italic yellow">defined</td>
167 <td class="snsn right italic yellow">61</td>
168 <td class="snss italic yellow">total</td>
169 <td class="sssn right italic yellow">90</td>
174 <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="B">Stage "B"</div>
175 <ul xmlns:ld="http://lambdadelta.info/">
177 <span class="emph alpha">Ongoing.</span>
178 Context-sensitive subject equivalence
179 for native type assignment.
182 <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="A2">Stage "A2": "Extending the Applicability Condition"</div>
183 <ul xmlns:ld="http://lambdadelta.info/">
185 <span class="emph alpha">2017 February 19.</span>
186 Generic candidates of reducibility.
189 <ul xmlns:ld="http://lambdadelta.info/">
191 <span class="emph alpha">2017 January 17.</span>
192 Confluence for parallel r-transition on referred entries of local environments.
195 <ul xmlns:ld="http://lambdadelta.info/">
197 <span class="emph alpha">2016 September 15.</span>
198 Confluence for context-sensitive parallel r-transition on terms.
201 <ul xmlns:ld="http://lambdadelta.info/">
203 <span class="emph alpha">2016 April 16.</span>
204 Grammatical component reconstructed:
205 grammar, relocation, s_transition, s_computation, static
206 (anniversary milestone).
209 <ul xmlns:ld="http://lambdadelta.info/">
211 <span class="emph alpha">2016 March 25.</span>
212 Relocation with reference transforming maps (rtmap).
215 <ul xmlns:ld="http://lambdadelta.info/">
217 <span class="emph alpha">2015 October 9.</span>
218 λδ version 2A2 is started.
221 <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="A1">Stage "A1": "Extending the Applicability Condition"</div>
222 <ul xmlns:ld="http://lambdadelta.info/">
224 <span class="emph delta">2015 August 27.</span>
225 λδ version 2A1 appears too complex and is dismissed.
228 <ul xmlns:ld="http://lambdadelta.info/">
230 <span class="emph gamma">2014 October 28.</span>
231 λδ version 2A1 is released.
234 <ul xmlns:ld="http://lambdadelta.info/">
236 <span class="emph beta">2014 September 9.</span>
237 Iterated static type assignment defined (more elegantly)
238 as a primitive notion.
241 <ul xmlns:ld="http://lambdadelta.info/">
243 <span class="emph beta">2014 June 18.</span>
244 Preservation of stratified native validity
245 for context-sensitive computation on terms.
248 <ul xmlns:ld="http://lambdadelta.info/">
250 <span class="emph alpha">2014 June 9.</span>
251 Strong qrst-normalization
252 for simply typed terms.
255 <ul xmlns:ld="http://lambdadelta.info/">
257 <span class="emph alpha">2014 April 16.</span>
258 Lazy equivalence on local environments
259 added as q-step to rst-computation on closures
260 (anniversary milestone).
263 <ul xmlns:ld="http://lambdadelta.info/">
265 <span class="emph alpha">2014 January 20.</span>
266 Parametrized slicing of local environments
267 comprises both versions of this operation
268 (one from basic_1, the other used in basic_2 till now).
271 <ul xmlns:ld="http://lambdadelta.info/">
273 <span class="emph alpha">2013 August 7.</span>
274 Passive support for global environments.
277 <ul xmlns:ld="http://lambdadelta.info/">
279 <span class="emph alpha">2013 July 27.</span>
280 Reaxiomatized β-reductum as in rt-reduction.
283 <ul xmlns:ld="http://lambdadelta.info/">
285 <span class="emph alpha">2013 July 20.</span>
286 Context-sensitive strong rt-normalization
287 for simply typed terms.
290 <ul xmlns:ld="http://lambdadelta.info/">
292 <span class="emph alpha">2013 April 16.</span>
293 Reaxiomatized substitution and reduction
294 commute with respect to subclosure
295 (anniversary milestone).
298 <ul xmlns:ld="http://lambdadelta.info/">
300 <span class="emph alpha">2013 March 16.</span>
301 Mutual recursive preservation of stratified native validity
302 for rst-computation on closures.
305 <ul xmlns:ld="http://lambdadelta.info/">
307 <span class="emph alpha">2012 October 16.</span>
308 Confluence for context-free parallel reduction on closures.
311 <ul xmlns:ld="http://lambdadelta.info/">
313 <span class="emph alpha">2012 July 26.</span>
314 Term binders polarized to control ζ-reduction (not released).
317 <ul xmlns:ld="http://lambdadelta.info/">
319 <span class="emph alpha">2012 April 16.</span>
320 Context-sensitive subject equivalence
321 for atomic arity assignment
322 (anniversary milestone).
325 <ul xmlns:ld="http://lambdadelta.info/">
327 <span class="emph alpha">2012 March 15.</span>
328 Context-sensitive strong normalization
329 for simply typed terms.
332 <ul xmlns:ld="http://lambdadelta.info/">
334 <span class="emph alpha">2012 January 27.</span>
335 Generic candidates of reducibility.
338 <ul xmlns:ld="http://lambdadelta.info/">
340 <span class="emph alpha">2011 September 21.</span>
341 Confluence for context-sensitive parallel reduction on terms.
344 <ul xmlns:ld="http://lambdadelta.info/">
346 <span class="emph alpha">2011 September 6.</span>
347 Confluence for context-free parallel reduction on terms.
350 <ul xmlns:ld="http://lambdadelta.info/">
352 <span class="emph alpha">2011 April 17.</span>
353 λδ version 2 is started.
356 <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="structure">Logical Structure of the Specification <img class="icon37" alt="[butterfly]" title="\lambda\delta butterfly" src="http://lambdadelta.info/images/b4.png" />
358 <div xmlns:ld="http://lambdadelta.info/" class="text">This table reports the specification's components and their planes.
360 <div xmlns:ld="http://lambdadelta.info/" class="text">
361 <table cellpadding="4" cellspacing="0">
364 <td class="snns top capitalize italic gray">component</td>
365 <td class="snns top italic gray">plane</td>
366 <td class="snns top gray">files</td>
367 <td class="ssnn top gray">
372 <td class="snns top capitalize italic cyan">rt-computation</td>
373 <td class="snns top italic cyan">uncounted context-sensitive rt-transition</td>
374 <td class="snns top cyan">cpxs ( ⦃?,?⦄ ⊢ ? ⬈*[?] ? )</td>
375 <td class="ssnn top cyan">
380 <td class="nnns top capitalize italic cyan">
383 <td class="snns top italic cyan">generic reducibility</td>
384 <td class="snns top cyan">lsubc ( ? ⊢ ? ⫃[?] ? )</td>
385 <td class="ssnn top cyan">lsubc_drop lsubc_drops lsubc_lsubr lsubc_lsuba</td>
388 <td class="nnns top capitalize italic cyan">
391 <td class="nnns top italic cyan">
394 <td class="snns top cyan">gcp_cr ( ⦃?,?,?⦄ ϵ[?] 〚?〛 )</td>
395 <td class="ssnn top cyan">gcp_aaa</td>
398 <td class="nnns top capitalize italic cyan">
401 <td class="nnns top italic cyan">
404 <td class="snns top cyan">gcp</td>
405 <td class="ssnn top cyan">
410 <td class="snns top capitalize italic water">rt-transition</td>
411 <td class="snns top italic water">parallel qrst-rtransition</td>
412 <td class="snns top water">fpb ( ⦃?,?,?⦄ ≻[?,?] ⦃?,?,?⦄ )</td>
413 <td class="ssnn top water">
418 <td class="nnns top capitalize italic water">
421 <td class="snns top italic water">t-bound context-sensitive rt-transition</td>
422 <td class="snns top water">lfpr ( ⦃?,?⦄ ⊢ ➡[?,?] ? )</td>
423 <td class="ssnn top water">lfpr_length lfpr_drops lfpr_fqup lfpr_frees lfpr_aaa lfpr_lfpx lfpr_lfpr</td>
426 <td class="nnns top capitalize italic water">
429 <td class="nnns top italic water">
432 <td class="snns top water">cpr ( ⦃?,?⦄ ⊢ ? ➡[?] ? )</td>
433 <td class="ssnn top water">cpr_drops</td>
436 <td class="nnns top capitalize italic water">
439 <td class="nnns top italic water">
442 <td class="snns top water">cpm ( ⦃?,?⦄ ⊢ ? ➡[?,?] ? )</td>
443 <td class="ssnn top water">cpm_simple cpm_drops cpm_lsubr cpm_lfxs cpm_cpx</td>
446 <td class="nnns top capitalize italic water">
449 <td class="snns top italic water">uncounted context-sensitive rt-transition</td>
450 <td class="snns top water">cnx ( ⦃?,?⦄ ⊢ ⬈[?,?] 𝐍⦃?⦄ )</td>
451 <td class="ssnn top water">cnx_simple cnx_drops</td>
454 <td class="nnns top capitalize italic water">
457 <td class="nnns top italic water">
460 <td class="snns top water">lfpx ( ⦃?,?⦄ ⊢ ⬈[?,?] ? )</td>
461 <td class="ssnn top water">lfpx_length lfpx_drops lfpx_fqup lfpx_frees lfpx_aaa</td>
464 <td class="nnns top capitalize italic water">
467 <td class="nnns top italic water">
470 <td class="snns top water">cpx ( ⦃?,?⦄ ⊢ ? ⬈[?] ? )</td>
471 <td class="ssnn top water">cpx_simple cpx_drops cpx_fqus cpx_lsubr cpx_lfxs cpx_lfdeq</td>
474 <td class="nnns top capitalize italic water">
477 <td class="snns top italic water">counted context-sensitive rt-transition</td>
478 <td class="snns top water">cpg ( ⦃?,?⦄ ⊢ ? ⬈[?,?] ? )</td>
479 <td class="ssnn top water">cpg_simple cpg_drops cpg_lsubr</td>
482 <td class="snns top capitalize italic green">static typing</td>
483 <td class="snns top italic green">atomic arity assignment</td>
484 <td class="snns top green">lsuba ( ? ⊢ ? ⫃⁝ ? )</td>
485 <td class="ssnn top green">lsuba_drops lsuba_lsubr lsuba_aaa lsuba_lsuba</td>
488 <td class="nnns top capitalize italic green">
491 <td class="nnns top italic green">
494 <td class="snns top green">aaa ( ⦃?,?⦄ ⊢ ? ⁝ ? )</td>
495 <td class="ssnn top green">aaa_drops aaa_fqus aaa_lfdeq aaa_aaa</td>
498 <td class="nnns top capitalize italic green">
501 <td class="snns top italic green">degree-based equivalence on referred entries</td>
502 <td class="snns top green">ffdeq ( ⦃?,?,?⦄ ≡[?,?] ⦃?,?,?⦄ )</td>
503 <td class="ssnn top green">ffdeq_fqup ffdeq_ffdeq</td>
506 <td class="nnns top capitalize italic green">
509 <td class="nnns top italic green">
512 <td class="snns top green">lfdeq ( ? ≡[?,?,?] ? )</td>
513 <td class="ssnn top green">lfdeq_length lfdeq_fqup lfdeq_lfdeq</td>
516 <td class="nnns top capitalize italic green">
519 <td class="snns top italic green">generic extension on referred entries</td>
520 <td class="snns top green">lfxs ( ? ⦻*[?,?] ? )</td>
521 <td class="ssnn top green">lfxs_length lfxs_drops lfxs_fqup lfxs_lfxs</td>
524 <td class="nnns top capitalize italic green">
527 <td class="snns top italic green">context-sensitive free variables</td>
528 <td class="snns top green">lsubf ( ⦃?,?⦄ ⫃𝐅* ⦃?,?⦄ )</td>
529 <td class="ssnn top green">lsubf_frees</td>
532 <td class="nnns top capitalize italic green">
535 <td class="nnns top italic green">
538 <td class="snns top green">frees ( ? ⊢ 𝐅*⦃?⦄ ≡ ? )</td>
539 <td class="ssnn top green">frees_weight frees_drops frees_fqup frees_frees</td>
542 <td class="nnns top capitalize italic green">
545 <td class="snns top italic green">restricted ref. for local env.</td>
546 <td class="snns top green">lsubr ( ? ⫃ ? )</td>
547 <td class="ssnn top green">lsubr_length lsubr_drops lsubr_lsubr</td>
550 <td class="snns top capitalize italic grass">s-computation</td>
551 <td class="snns top italic grass">iterated structural successor for closures</td>
552 <td class="snns top grass">fqus ( ⦃?,?,?⦄ ⊐* ⦃?,?,?⦄ )</td>
553 <td class="ssnn top grass">fqus_weight fqus_drops fqus_fqup fqus_fqus</td>
556 <td class="nnns top capitalize italic grass">
559 <td class="nnns top italic grass">
562 <td class="snns top grass">fqup ( ⦃?,?,?⦄ ⊐+ ⦃?,?,?⦄ )</td>
563 <td class="ssnn top grass">fqup_weight fqup_drops fqup_fqup</td>
566 <td class="snns top capitalize italic yellow">s-transition</td>
567 <td class="snns top italic yellow">structural successor for closures</td>
568 <td class="snns top yellow">fquq ( ⦃?,?,?⦄ ⊐⸮ ⦃?,?,?⦄ )</td>
569 <td class="ssnn top yellow">fquq_length fquq_weight</td>
572 <td class="nnns top capitalize italic yellow">
575 <td class="nnns top italic yellow">
578 <td class="snns top yellow">fqu ( ⦃?,?,?⦄ ⊐ ⦃?,?,?⦄ )</td>
579 <td class="ssnn top yellow">fqu_length fqu_weight</td>
582 <td class="snns top capitalize italic orange">relocation</td>
583 <td class="snns top italic orange">generic slicing for local environments</td>
584 <td class="snns top orange">drops_vector ( ⬇*[?,?] ? ≡ ? ) ( ⬇*[?] ? ≡ ? )</td>
585 <td class="ssnn top orange">
590 <td class="nnns top capitalize italic orange">
593 <td class="nnns top italic orange">
596 <td class="snns top orange">drops ( ⬇*[?,?] ? ≡ ? ) ( ⬇*[?] ? ≡ ? )</td>
597 <td class="ssnn top orange">drops_lstar drops_weight drops_length drops_ceq drops_lexs drops_lreq drops_drops</td>
600 <td class="nnns top capitalize italic orange">
603 <td class="snns top italic orange">generic relocation for terms</td>
604 <td class="snns top orange">lifts_vector ( ⬆*[?] ? ≡ ? )</td>
605 <td class="ssnn top orange">lifts_lifts_vector</td>
608 <td class="nnns top capitalize italic orange">
611 <td class="nnns top italic orange">
614 <td class="snns top orange">lifts ( ⬆*[?] ? ≡ ? )</td>
615 <td class="ssnn top orange">lifts_simple lifts_weight lifts_tdeq lifts_lifts</td>
618 <td class="nnns top capitalize italic orange">
621 <td class="snns top italic orange">ranged equivalence for local environments</td>
622 <td class="snns top orange">lreq ( ? ≡[?] ? )</td>
623 <td class="ssnn top orange">lreq_length lreq_lreq</td>
626 <td class="nnns top capitalize italic orange">
629 <td class="snns top italic orange">generic entrywise extension</td>
630 <td class="snns top orange">lexs ( ? ⦻*[?,?,?] ? )</td>
631 <td class="ssnn top orange">lexs_length lexs_lexs</td>
634 <td class="snns top capitalize italic red">syntax</td>
635 <td class="snns top italic red">append for local environments</td>
636 <td class="snns top red">append ( ? @@ ? )</td>
637 <td class="ssnn top red">append_length</td>
640 <td class="nnns top capitalize italic red">
643 <td class="snns top italic red">degree-based equivalence for terms</td>
644 <td class="snns top red">deq ( ? ≡[?,?] ? ) </td>
645 <td class="ssnn top red">deq_deq</td>
648 <td class="nnns top capitalize italic red">
651 <td class="snns top italic red">same top term structure</td>
652 <td class="snns top red">tsts ( ? ≂ ? )</td>
653 <td class="ssnn top red">tsts_tsts tsts_vector</td>
656 <td class="nnns top capitalize italic red">
659 <td class="snns top italic red">closures</td>
660 <td class="snns top red">cl_weight ( ♯{?,?,?} )</td>
661 <td class="ssnn top red">
666 <td class="nnns top capitalize italic red">
669 <td class="nnns top italic red">
672 <td class="snns top red">cl_restricted_weight ( ♯{?,?} )</td>
673 <td class="ssnn top red">
678 <td class="nnns top capitalize italic red">
681 <td class="snns top italic red">global environments</td>
682 <td class="snns top red">genv</td>
683 <td class="ssnn top red">
688 <td class="nnns top capitalize italic red">
691 <td class="snns top italic red">local environments</td>
692 <td class="snns top red">lenv_length ( |?| )</td>
693 <td class="ssnn top red">
698 <td class="nnns top capitalize italic red">
701 <td class="nnns top italic red">
704 <td class="snns top red">lenv_weight ( ♯{?} )</td>
705 <td class="ssnn top red">
710 <td class="nnns top capitalize italic red">
713 <td class="nnns top italic red">
716 <td class="snns top red">lenv</td>
717 <td class="ssnn top red">
722 <td class="nnns top capitalize italic red">
725 <td class="snns top italic red">terms</td>
726 <td class="snns top red">term_vector ( Ⓐ?.? )</td>
727 <td class="ssnn top red">
732 <td class="nnns top capitalize italic red">
735 <td class="nnns top italic red">
738 <td class="snns top red">term_simple ( 𝐒⦃?⦄ )</td>
739 <td class="ssnn top red">
744 <td class="nnns top capitalize italic red">
747 <td class="nnns top italic red">
750 <td class="snns top red">term_weight ( ♯{?} )</td>
751 <td class="ssnn top red">
756 <td class="nnns top capitalize italic red">
759 <td class="nnns top italic red">
762 <td class="snns top red">term</td>
763 <td class="ssnn top red">
768 <td class="nnns top capitalize italic red">
771 <td class="snns top italic red">items</td>
772 <td class="snns top red">item_sd</td>
773 <td class="ssnn top red">
778 <td class="nnns top capitalize italic red">
781 <td class="nnns top italic red">
784 <td class="snns top red">item_sh</td>
785 <td class="ssnn top red">
790 <td class="nnns top capitalize italic red">
793 <td class="nnns top italic red">
796 <td class="snns top red">item</td>
797 <td class="ssnn top red">
802 <td class="nnss top capitalize italic red">
805 <td class="snss top italic red">atomic arities</td>
806 <td class="snss top red">aarity</td>
807 <td class="sssn top red">
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840 <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Sun, 19 Feb 2017 16:52:48 +0100</div>