helm/www/lambdadelta/basic_2.html

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  10     <title>\lambda\delta home page</title>
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  20       </a>
  21     </div>
  22     <div class="head1">cic:/matita/lambdadelta/basic_2/ (core λδ version 2)</div>
  23     <div class="spacer">
  24       <img class="rule" alt="[Spacer]" title="\lambda\delta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
  25     </div>
  26     <div xmlns:ld="http://lambdadelta.info/" class="spacer">
  27       <br />
  28     </div>
  29     <div xmlns:ld="http://lambdadelta.info/" class="text">
  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    <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.
 109    </body>
 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.
 115    </body>
 116 -->
 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" />
 118     </div>
 119     <div xmlns:ld="http://lambdadelta.info/" class="text">Here is a numerical account of the specification's contents
 120          and its timeline.
 121    </div>
 122     <div xmlns:ld="http://lambdadelta.info/" class="text">
 123       <table cellpadding="4" cellspacing="0">
 124         <tbody>
 125           <tr>
 126             <td class="snns capitalize italic gray">category</td>
 127             <td class="snns italic gray">objects</td>
 128             <td class="snnn right italic gray">
 129               <br />
 130             </td>
 131             <td class="snnn italic gray">
 132               <br />
 133             </td>
 134             <td class="snnn right italic gray">
 135               <br />
 136             </td>
 137             <td class="snnn italic gray">
 138               <br />
 139             </td>
 140             <td class="ssnn right italic gray">
 141               <br />
 142             </td>
 143           </tr>
 144           <tr>
 145             <td class="snns capitalize italic cyan">sizes</td>
 146             <td class="snns italic cyan">files</td>
 147             <td class="snnn right italic cyan">244</td>
 148             <td class="snns italic cyan">characters</td>
 149             <td class="snnn right italic cyan">255638</td>
 150             <td class="snns italic cyan">nodes</td>
 151             <td class="ssnn right italic cyan">1250056</td>
 152           </tr>
 153           <tr>
 154             <td class="snns capitalize italic green">propositions</td>
 155             <td class="snns italic green">theorems</td>
 156             <td class="snnn right italic green">71</td>
 157             <td class="snns italic green">lemmas</td>
 158             <td class="snnn right italic green">866</td>
 159             <td class="snns italic green">total</td>
 160             <td class="ssnn right italic green">937</td>
 161           </tr>
 162           <tr>
 163             <td class="snss capitalize italic yellow">concepts</td>
 164             <td class="snss italic yellow">declared</td>
 165             <td class="snsn right italic yellow">31</td>
 166             <td class="snss italic yellow">defined</td>
 167             <td class="snsn right italic yellow">80</td>
 168             <td class="snss italic yellow">total</td>
 169             <td class="sssn right italic yellow">111</td>
 170           </tr>
 171         </tbody>
 172       </table>
 173     </div>
 174     <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="B">Stage "B"</div>
 175     <ul xmlns:ld="http://lambdadelta.info/">
 176       <li>
 177         <span class="emph alpha">Ongoing.</span>
 178          Context-sensitive subject equivalence
 179          for native type assignment.
 180    </li>
 181     </ul>
 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/">
 184       <li>
 185         <span class="emph alpha">2017 October 17.</span>
 186          Exclusion binder in local environments.
 187          Syntactic component updated:
 188          syntax, relocation, s_transition, s_computation, static, i_static.
 189    </li>
 190     </ul>
 191     <ul xmlns:ld="http://lambdadelta.info/">
 192       <li>
 193         <span class="emph alpha">2017 April 16.</span>
 194          Strong rt-normalization
 195          for simply typed terms
 196          (anniversary milestone).
 197    </li>
 198     </ul>
 199     <ul xmlns:ld="http://lambdadelta.info/">
 200       <li>
 201         <span class="emph alpha">2017 March 16.</span>
 202          First behavioral component reconstructed:
 203          rt_transition.
 204    </li>
 205     </ul>
 206     <ul xmlns:ld="http://lambdadelta.info/">
 207       <li>
 208         <span class="emph alpha">2017 February 19.</span>
 209          Generic candidates of reducibility.
 210    </li>
 211     </ul>
 212     <ul xmlns:ld="http://lambdadelta.info/">
 213       <li>
 214         <span class="emph alpha">2017 January 17.</span>
 215          Confluence for parallel r-transition on referred entries of local environments.
 216    </li>
 217     </ul>
 218     <ul xmlns:ld="http://lambdadelta.info/">
 219       <li>
 220         <span class="emph alpha">2016 September 15.</span>
 221          Confluence for context-sensitive parallel r-transition on terms.
 222    </li>
 223     </ul>
 224     <ul xmlns:ld="http://lambdadelta.info/">
 225       <li>
 226         <span class="emph alpha">2016 April 16.</span>
 227          Syntactic component reconstructed:
 228          syntax, relocation, s_transition, s_computation, static
 229          (anniversary milestone).
 230    </li>
 231     </ul>
 232     <ul xmlns:ld="http://lambdadelta.info/">
 233       <li>
 234         <span class="emph alpha">2016 March 25.</span>
 235          Relocation with reference transforming maps (rtmap).
 236    </li>
 237     </ul>
 238     <ul xmlns:ld="http://lambdadelta.info/">
 239       <li>
 240         <span class="emph alpha">2015 October 9.</span>
 241          λδ version 2A2 is started.
 242    </li>
 243     </ul>
 244     <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="A1">Stage "A1": "Extending the Applicability Condition"</div>
 245     <ul xmlns:ld="http://lambdadelta.info/">
 246       <li>
 247         <span class="emph delta">2015 August 27.</span>
 248          λδ version 2A1 appears too complex and is dismissed.
 249    </li>
 250     </ul>
 251     <ul xmlns:ld="http://lambdadelta.info/">
 252       <li>
 253         <span class="emph gamma">2014 October 28.</span>
 254          λδ version 2A1 is released.
 255    </li>
 256     </ul>
 257     <ul xmlns:ld="http://lambdadelta.info/">
 258       <li>
 259         <span class="emph beta">2014 September 9.</span>
 260          Iterated static type assignment defined (more elegantly)
 261          as a primitive notion.
 262    </li>
 263     </ul>
 264     <ul xmlns:ld="http://lambdadelta.info/">
 265       <li>
 266         <span class="emph beta">2014 June 18.</span>
 267          Preservation of stratified native validity
 268          for context-sensitive computation on terms.
 269    </li>
 270     </ul>
 271     <ul xmlns:ld="http://lambdadelta.info/">
 272       <li>
 273         <span class="emph alpha">2014 June 9.</span>
 274          Strong qrst-normalization
 275          for simply typed terms.
 276    </li>
 277     </ul>
 278     <ul xmlns:ld="http://lambdadelta.info/">
 279       <li>
 280         <span class="emph alpha">2014 April 16.</span>
 281          Lazy equivalence on local environments
 282          added as q-step to rst-computation on closures
 283          (anniversary milestone).
 284    </li>
 285     </ul>
 286     <ul xmlns:ld="http://lambdadelta.info/">
 287       <li>
 288         <span class="emph alpha">2014 January 20.</span>
 289          Parametrized slicing on local environments
 290          comprises both versions of this operation
 291          (one from basic_1, the other used in basic_2 till now).
 292    </li>
 293     </ul>
 294     <ul xmlns:ld="http://lambdadelta.info/">
 295       <li>
 296         <span class="emph alpha">2013 August 7.</span>
 297          Passive support for global environments.
 298    </li>
 299     </ul>
 300     <ul xmlns:ld="http://lambdadelta.info/">
 301       <li>
 302         <span class="emph alpha">2013 July 27.</span>
 303          Reaxiomatized β-reductum as in rt-reduction.
 304    </li>
 305     </ul>
 306     <ul xmlns:ld="http://lambdadelta.info/">
 307       <li>
 308         <span class="emph alpha">2013 July 20.</span>
 309          Context-sensitive strong rt-normalization
 310          for simply typed terms.
 311    </li>
 312     </ul>
 313     <ul xmlns:ld="http://lambdadelta.info/">
 314       <li>
 315         <span class="emph alpha">2013 April 16.</span>
 316          Reaxiomatized substitution and reduction
 317          commute with respect to subclosure
 318          (anniversary milestone).
 319    </li>
 320     </ul>
 321     <ul xmlns:ld="http://lambdadelta.info/">
 322       <li>
 323         <span class="emph alpha">2013 March 16.</span>
 324          Mutual recursive preservation of stratified native validity
 325          for rst-computation on closures.
 326    </li>
 327     </ul>
 328     <ul xmlns:ld="http://lambdadelta.info/">
 329       <li>
 330         <span class="emph alpha">2012 October 16.</span>
 331          Confluence for context-free parallel reduction on closures.
 332    </li>
 333     </ul>
 334     <ul xmlns:ld="http://lambdadelta.info/">
 335       <li>
 336         <span class="emph alpha">2012 July 26.</span>
 337          Term binders polarized to control ζ-reduction (not released).
 338    </li>
 339     </ul>
 340     <ul xmlns:ld="http://lambdadelta.info/">
 341       <li>
 342         <span class="emph alpha">2012 April 16.</span>
 343          Context-sensitive subject equivalence
 344          for atomic arity assignment
 345          (anniversary milestone).
 346    </li>
 347     </ul>
 348     <ul xmlns:ld="http://lambdadelta.info/">
 349       <li>
 350         <span class="emph alpha">2012 March 15.</span>
 351          Context-sensitive strong normalization
 352          for simply typed terms.
 353    </li>
 354     </ul>
 355     <ul xmlns:ld="http://lambdadelta.info/">
 356       <li>
 357         <span class="emph alpha">2012 January 27.</span>
 358          Generic candidates of reducibility.
 359    </li>
 360     </ul>
 361     <ul xmlns:ld="http://lambdadelta.info/">
 362       <li>
 363         <span class="emph alpha">2011 September 21.</span>
 364          Confluence for context-sensitive parallel reduction on terms.
 365    </li>
 366     </ul>
 367     <ul xmlns:ld="http://lambdadelta.info/">
 368       <li>
 369         <span class="emph alpha">2011 September 6.</span>
 370          Confluence for context-free parallel reduction on terms.
 371    </li>
 372     </ul>
 373     <ul xmlns:ld="http://lambdadelta.info/">
 374       <li>
 375         <span class="emph alpha">2011 April 17.</span>
 376          λδ version 2 is started.
 377    </li>
 378     </ul>
 379     <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" />
 380     </div>
 381     <div xmlns:ld="http://lambdadelta.info/" class="text">This table reports the specification's components and their planes.
 382    </div>
 383     <div xmlns:ld="http://lambdadelta.info/" class="text">
 384       <table cellpadding="4" cellspacing="0">
 385         <tbody>
 386           <tr>
 387             <td class="snns top capitalize italic gray">component</td>
 388             <td class="snns top italic gray">plane</td>
 389             <td class="snns top gray">files</td>
 390             <td class="ssnn top gray">
 391               <br />
 392             </td>
 393           </tr>
 394           <tr>
 395             <td class="snns top capitalize italic blue">rt-conversion</td>
 396             <td class="snns top italic blue">context-sensitive r-conversion</td>
 397             <td class="snns top blue">cpc ( ⦃?,?⦄ ⊢ ? ⬌[?] ? )</td>
 398             <td class="ssnn top blue">cpc_cpc</td>
 399           </tr>
 400           <tr>
 401             <td class="snns top capitalize italic cyan">rt-transition</td>
 402             <td class="snns top italic cyan">uncounted rst-transition</td>
 403             <td class="snns top cyan">fpbq ( ⦃?,?,?⦄ ≽[?] ⦃?,?,?⦄ )</td>
 404             <td class="ssnn top cyan">fpbq_aaa</td>
 405           </tr>
 406           <tr>
 407             <td class="nnns top capitalize italic cyan">
 408               <br />
 409             </td>
 410             <td class="nnns top italic cyan">
 411               <br />
 412             </td>
 413             <td class="snns top cyan">fpb ( ⦃?,?,?⦄ ≻[?,?] ⦃?,?,?⦄ )</td>
 414             <td class="ssnn top cyan">fpb_lfdeq</td>
 415           </tr>
 416           <tr>
 417             <td class="nnns top capitalize italic cyan">
 418               <br />
 419             </td>
 420             <td class="snns top italic cyan">t-bound context-sensitive rt-transition</td>
 421             <td class="snns top cyan">lfpr ( ⦃?,?⦄ ⊢ ➡[?,?] ? )</td>
 422             <td class="ssnn top cyan">lfpr_length lfpr_drops lfpr_fquq lfpr_fqup lfpr_frees lfpr_aaa lfpr_lfpx lfpr_lfpr</td>
 423           </tr>
 424           <tr>
 425             <td class="nnns top capitalize italic cyan">
 426               <br />
 427             </td>
 428             <td class="nnns top italic cyan">
 429               <br />
 430             </td>
 431             <td class="snns top cyan">cpr_ext ( ⦃?,?⦄ ⊢ ? ➡[?] ? )</td>
 432             <td class="ssnn top cyan">
 433               <br />
 434             </td>
 435           </tr>
 436           <tr>
 437             <td class="nnns top capitalize italic cyan">
 438               <br />
 439             </td>
 440             <td class="nnns top italic cyan">
 441               <br />
 442             </td>
 443             <td class="snns top cyan">cpr ( ⦃?,?⦄ ⊢ ? ➡[?] ? )</td>
 444             <td class="ssnn top cyan">cpr_drops</td>
 445           </tr>
 446           <tr>
 447             <td class="nnns top capitalize italic cyan">
 448               <br />
 449             </td>
 450             <td class="nnns top italic cyan">
 451               <br />
 452             </td>
 453             <td class="snns top cyan">cpm ( ⦃?,?⦄ ⊢ ? ➡[?,?] ? )</td>
 454             <td class="ssnn top cyan">cpm_simple cpm_drops cpm_lsubr cpm_lfxs cpm_cpx</td>
 455           </tr>
 456           <tr>
 457             <td class="nnns top capitalize italic cyan">
 458               <br />
 459             </td>
 460             <td class="snns top italic cyan">uncounted context-sensitive rt-transition</td>
 461             <td class="snns top cyan">cnx ( ⦃?,?⦄ ⊢ ⬈[?,?] 𝐍⦃?⦄ )</td>
 462             <td class="ssnn top cyan">cnx_simple cnx_drops cnx_cnx</td>
 463           </tr>
 464           <tr>
 465             <td class="nnns top capitalize italic cyan">
 466               <br />
 467             </td>
 468             <td class="nnns top italic cyan">
 469               <br />
 470             </td>
 471             <td class="snns top cyan">lfpx ( ⦃?,?⦄ ⊢ ⬈[?,?] ? )</td>
 472             <td class="ssnn top cyan">lfpx_length lfpx_drops lfpx_fqup lfpx_frees lfpx_lfdeq lfpx_aaa lfpx_cpx lfpx_lfpx</td>
 473           </tr>
 474           <tr>
 475             <td class="nnns top capitalize italic cyan">
 476               <br />
 477             </td>
 478             <td class="nnns top italic cyan">
 479               <br />
 480             </td>
 481             <td class="snns top cyan">cpx_ext ( ⦃?,?⦄ ⊢ ? ⬈[?] ? )</td>
 482             <td class="ssnn top cyan">
 483               <br />
 484             </td>
 485           </tr>
 486           <tr>
 487             <td class="nnns top capitalize italic cyan">
 488               <br />
 489             </td>
 490             <td class="nnns top italic cyan">
 491               <br />
 492             </td>
 493             <td class="snns top cyan">cpx ( ⦃?,?⦄ ⊢ ? ⬈[?] ? )</td>
 494             <td class="ssnn top cyan">cpx_simple cpx_drops cpx_fqus cpx_lsubr cpx_lfxs</td>
 495           </tr>
 496           <tr>
 497             <td class="nnns top capitalize italic cyan">
 498               <br />
 499             </td>
 500             <td class="snns top italic cyan">counted context-sensitive rt-transition</td>
 501             <td class="snns top cyan">cpg ( ⦃?,?⦄ ⊢ ? ⬈[?,?] ? )</td>
 502             <td class="ssnn top cyan">cpg_simple cpg_drops cpg_lsubr</td>
 503           </tr>
 504           <tr>
 505             <td class="snns top capitalize italic water">iterated static typing</td>
 506             <td class="snns top italic water">iterated extension on referred entries</td>
 507             <td class="snns top water">tc_lfxs ( ? ⦻**[?,?] ? )</td>
 508             <td class="ssnn top water">tc_lfxs_length tc_lfxs_drops tc_lfxs_fqup tc_lfxs_tc_lfxs</td>
 509           </tr>
 510           <tr>
 511             <td class="snns top capitalize italic green">static typing</td>
 512             <td class="snns top italic green">generic reducibility</td>
 513             <td class="snns top green">lsubc ( ? ⊢ ? ⫃[?] ? )</td>
 514             <td class="ssnn top green">lsubc_drops lsubc_lsubr lsubc_lsuba</td>
 515           </tr>
 516           <tr>
 517             <td class="nnns top capitalize italic green">
 518               <br />
 519             </td>
 520             <td class="nnns top italic green">
 521               <br />
 522             </td>
 523             <td class="snns top green">gcp_cr ( ⦃?,?,?⦄ ϵ[?] 〚?〛 )</td>
 524             <td class="ssnn top green">gcp_aaa</td>
 525           </tr>
 526           <tr>
 527             <td class="nnns top capitalize italic green">
 528               <br />
 529             </td>
 530             <td class="nnns top italic green">
 531               <br />
 532             </td>
 533             <td class="snns top green">gcp</td>
 534             <td class="ssnn top green">
 535               <br />
 536             </td>
 537           </tr>
 538           <tr>
 539             <td class="nnns top capitalize italic green">
 540               <br />
 541             </td>
 542             <td class="snns top italic green">atomic arity assignment</td>
 543             <td class="snns top green">lsuba ( ? ⊢ ? ⫃⁝ ? )</td>
 544             <td class="ssnn top green">lsuba_drops lsuba_lsubr lsuba_aaa lsuba_lsuba</td>
 545           </tr>
 546           <tr>
 547             <td class="nnns top capitalize italic green">
 548               <br />
 549             </td>
 550             <td class="nnns top italic green">
 551               <br />
 552             </td>
 553             <td class="snns top green">aaa ( ⦃?,?⦄ ⊢ ? ⁝ ? )</td>
 554             <td class="ssnn top green">aaa_drops aaa_fqus aaa_lfdeq aaa_aaa</td>
 555           </tr>
 556           <tr>
 557             <td class="nnns top capitalize italic green">
 558               <br />
 559             </td>
 560             <td class="snns top italic green">degree-based equivalence on referred entries</td>
 561             <td class="snns top green">ffdeq ( ⦃?,?,?⦄ ≡[?,?] ⦃?,?,?⦄ )</td>
 562             <td class="ssnn top green">ffdeq_fqup ffdeq_ffdeq</td>
 563           </tr>
 564           <tr>
 565             <td class="nnns top capitalize italic green">
 566               <br />
 567             </td>
 568             <td class="nnns top italic green">
 569               <br />
 570             </td>
 571             <td class="snns top green">lfdeq ( ? ≡[?,?,?] ? )</td>
 572             <td class="ssnn top green">lfdeq_length lfdeq_drops lfdeq_fqup lfdeq_fqus lfdeq_lfdeq</td>
 573           </tr>
 574           <tr>
 575             <td class="nnns top capitalize italic green">
 576               <br />
 577             </td>
 578             <td class="snns top italic green">generic extension on referred entries</td>
 579             <td class="snns top green">lfxs ( ? ⦻*[?,?] ? )</td>
 580             <td class="ssnn top green">lfxs_length lfxs_drops lfxs_fqup lfxs_lfxs</td>
 581           </tr>
 582           <tr>
 583             <td class="nnns top capitalize italic green">
 584               <br />
 585             </td>
 586             <td class="snns top italic green">context-sensitive free variables</td>
 587             <td class="snns top green">lsubf ( ⦃?,?⦄ ⫃𝐅* ⦃?,?⦄ )</td>
 588             <td class="ssnn top green">lsubf_lsubr lsubf_frees lsubf_lsubf</td>
 589           </tr>
 590           <tr>
 591             <td class="nnns top capitalize italic green">
 592               <br />
 593             </td>
 594             <td class="nnns top italic green">
 595               <br />
 596             </td>
 597             <td class="snns top green">frees ( ? ⊢ 𝐅*⦃?⦄ ≡ ? )</td>
 598             <td class="ssnn top green">frees_drops frees_fqup frees_frees</td>
 599           </tr>
 600           <tr>
 601             <td class="nnns top capitalize italic green">
 602               <br />
 603             </td>
 604             <td class="snns top italic green">restricted ref. for local env.</td>
 605             <td class="snns top green">lsubr ( ? ⫃ ? )</td>
 606             <td class="ssnn top green">lsubr_length lsubr_drops lsubr_lsubr</td>
 607           </tr>
 608           <tr>
 609             <td class="snns top capitalize italic grass">s-computation</td>
 610             <td class="snns top italic grass">iterated structural successor for closures</td>
 611             <td class="snns top grass">fqus ( ⦃?,?,?⦄ ⊐*[?] ⦃?,?,?⦄ ) ( ⦃?,?,?⦄ ⊐* ⦃?,?,?⦄ )</td>
 612             <td class="ssnn top grass">fqus_weight fqus_drops fqus_fqup fqus_fqus</td>
 613           </tr>
 614           <tr>
 615             <td class="nnns top capitalize italic grass">
 616               <br />
 617             </td>
 618             <td class="nnns top italic grass">
 619               <br />
 620             </td>
 621             <td class="snns top grass">fqup ( ⦃?,?,?⦄ ⊐+[?] ⦃?,?,?⦄ ) ( ⦃?,?,?⦄ ⊐+ ⦃?,?,?⦄ )</td>
 622             <td class="ssnn top grass">fqup_weight fqup_drops fqup_fqup</td>
 623           </tr>
 624           <tr>
 625             <td class="snns top capitalize italic yellow">s-transition</td>
 626             <td class="snns top italic yellow">structural successor for closures</td>
 627             <td class="snns top yellow">fquq ( ⦃?,?,?⦄ ⊐⸮[?] ⦃?,?,?⦄ ) ( ⦃?,?,?⦄ ⊐⸮ ⦃?,?,?⦄ )</td>
 628             <td class="ssnn top yellow">fquq_length fquq_weight</td>
 629           </tr>
 630           <tr>
 631             <td class="nnns top capitalize italic yellow">
 632               <br />
 633             </td>
 634             <td class="nnns top italic yellow">
 635               <br />
 636             </td>
 637             <td class="snns top yellow">fqu ( ⦃?,?,?⦄ ⊐[?] ⦃?,?,?⦄ ) ( ⦃?,?,?⦄ ⊐ ⦃?,?,?⦄ )</td>
 638             <td class="ssnn top yellow">fqu_length fqu_weight</td>
 639           </tr>
 640           <tr>
 641             <td class="snns top capitalize italic orange">relocation</td>
 642             <td class="snns top italic orange">generic slicing for local environments</td>
 643             <td class="snns top orange">drops_vector ( ⬇*[?,?] ? ≡ ? ) ( ⬇*[?] ? ≡ ? )</td>
 644             <td class="ssnn top orange">
 645               <br />
 646             </td>
 647           </tr>
 648           <tr>
 649             <td class="nnns top capitalize italic orange">
 650               <br />
 651             </td>
 652             <td class="nnns top italic orange">
 653               <br />
 654             </td>
 655             <td class="snns top orange">drops ( ⬇*[?,?] ? ≡ ? ) ( ⬇*[?] ? ≡ ? )</td>
 656             <td class="ssnn top orange">drops_lstar drops_weight drops_length drops_ext2 drops_lexs drops_lreq drops_drops</td>
 657           </tr>
 658           <tr>
 659             <td class="nnns top capitalize italic orange">
 660               <br />
 661             </td>
 662             <td class="snns top italic orange">generic relocation</td>
 663             <td class="snns top orange">lifts_bind ( ⬆*[?] ? ≡ ? )</td>
 664             <td class="ssnn top orange">lifts_weight_bind lifts_lifts_bind</td>
 665           </tr>
 666           <tr>
 667             <td class="nnns top capitalize italic orange">
 668               <br />
 669             </td>
 670             <td class="nnns top italic orange">
 671               <br />
 672             </td>
 673             <td class="snns top orange">lifts_vector ( ⬆*[?] ? ≡ ? )</td>
 674             <td class="ssnn top orange">lifts_lifts_vector</td>
 675           </tr>
 676           <tr>
 677             <td class="nnns top capitalize italic orange">
 678               <br />
 679             </td>
 680             <td class="nnns top italic orange">
 681               <br />
 682             </td>
 683             <td class="snns top orange">lifts ( ⬆*[?] ? ≡ ? )</td>
 684             <td class="ssnn top orange">lifts_simple lifts_weight lifts_tdeq lifts_lifts</td>
 685           </tr>
 686           <tr>
 687             <td class="nnns top capitalize italic orange">
 688               <br />
 689             </td>
 690             <td class="snns top italic orange">ranged equivalence for local environments</td>
 691             <td class="snns top orange">lreq ( ? ≡[?] ? )</td>
 692             <td class="ssnn top orange">lreq_length lreq_lreq</td>
 693           </tr>
 694           <tr>
 695             <td class="nnns top capitalize italic orange">
 696               <br />
 697             </td>
 698             <td class="snns top italic orange">generic entrywise extension</td>
 699             <td class="snns top orange">lexs ( ? ⦻*[?,?,?] ? )</td>
 700             <td class="ssnn top orange">lexs_length lexs_lexs</td>
 701           </tr>
 702           <tr>
 703             <td class="snns top capitalize italic red">syntax</td>
 704             <td class="snns top italic red">append for local environments</td>
 705             <td class="snns top red">append ( ? @@ ? )</td>
 706             <td class="ssnn top red">append_length</td>
 707           </tr>
 708           <tr>
 709             <td class="nnns top capitalize italic red">
 710               <br />
 711             </td>
 712             <td class="snns top italic red">head equivalence for terms</td>
 713             <td class="snns top red">theq ( ? ⩳[?,?] ? )</td>
 714             <td class="ssnn top red">theq_simple theq_tdeq theq_theq theq_simple_vector</td>
 715           </tr>
 716           <tr>
 717             <td class="nnns top capitalize italic red">
 718               <br />
 719             </td>
 720             <td class="snns top italic red">degree-based equivalence</td>
 721             <td class="snns top red">tdeq_ext ( ? ≡[?,?] ? ) ( ? ⊢ ? ≡[?,?] ? )</td>
 722             <td class="ssnn top red">
 723               <br />
 724             </td>
 725           </tr>
 726           <tr>
 727             <td class="nnns top capitalize italic red">
 728               <br />
 729             </td>
 730             <td class="nnns top italic red">
 731               <br />
 732             </td>
 733             <td class="snns top red">tdeq ( ? ≡[?,?] ? )</td>
 734             <td class="ssnn top red">tdeq_tdeq</td>
 735           </tr>
 736           <tr>
 737             <td class="nnns top capitalize italic red">
 738               <br />
 739             </td>
 740             <td class="snns top italic red">closures</td>
 741             <td class="snns top red">cl_weight ( ♯{?,?,?} )</td>
 742             <td class="ssnn top red">
 743               <br />
 744             </td>
 745           </tr>
 746           <tr>
 747             <td class="nnns top capitalize italic red">
 748               <br />
 749             </td>
 750             <td class="nnns top italic red">
 751               <br />
 752             </td>
 753             <td class="snns top red">cl_restricted_weight ( ♯{?,?} )</td>
 754             <td class="ssnn top red">
 755               <br />
 756             </td>
 757           </tr>
 758           <tr>
 759             <td class="nnns top capitalize italic red">
 760               <br />
 761             </td>
 762             <td class="snns top italic red">global environments</td>
 763             <td class="snns top red">genv</td>
 764             <td class="ssnn top red">
 765               <br />
 766             </td>
 767           </tr>
 768           <tr>
 769             <td class="nnns top capitalize italic red">
 770               <br />
 771             </td>
 772             <td class="snns top italic red">local environments</td>
 773             <td class="snns top red">lenv_ext2</td>
 774             <td class="ssnn top red">
 775               <br />
 776             </td>
 777           </tr>
 778           <tr>
 779             <td class="nnns top capitalize italic red">
 780               <br />
 781             </td>
 782             <td class="nnns top italic red">
 783               <br />
 784             </td>
 785             <td class="snns top red">lenv_length ( |?| )</td>
 786             <td class="ssnn top red">
 787               <br />
 788             </td>
 789           </tr>
 790           <tr>
 791             <td class="nnns top capitalize italic red">
 792               <br />
 793             </td>
 794             <td class="nnns top italic red">
 795               <br />
 796             </td>
 797             <td class="snns top red">lenv_weight ( ♯{?} )</td>
 798             <td class="ssnn top red">
 799               <br />
 800             </td>
 801           </tr>
 802           <tr>
 803             <td class="nnns top capitalize italic red">
 804               <br />
 805             </td>
 806             <td class="nnns top italic red">
 807               <br />
 808             </td>
 809             <td class="snns top red">lenv</td>
 810             <td class="ssnn top red">
 811               <br />
 812             </td>
 813           </tr>
 814           <tr>
 815             <td class="nnns top capitalize italic red">
 816               <br />
 817             </td>
 818             <td class="snns top italic red">binders for local environments</td>
 819             <td class="snns top red">ext2</td>
 820             <td class="ssnn top red">ext2_ext2</td>
 821           </tr>
 822           <tr>
 823             <td class="nnns top capitalize italic red">
 824               <br />
 825             </td>
 826             <td class="nnns top italic red">
 827               <br />
 828             </td>
 829             <td class="snns top red">bind</td>
 830             <td class="ssnn top red">bind_weight</td>
 831           </tr>
 832           <tr>
 833             <td class="nnns top capitalize italic red">
 834               <br />
 835             </td>
 836             <td class="snns top italic red">terms</td>
 837             <td class="snns top red">term_vector ( Ⓐ?.? )</td>
 838             <td class="ssnn top red">
 839               <br />
 840             </td>
 841           </tr>
 842           <tr>
 843             <td class="nnns top capitalize italic red">
 844               <br />
 845             </td>
 846             <td class="nnns top italic red">
 847               <br />
 848             </td>
 849             <td class="snns top red">term_simple ( 𝐒⦃?⦄ )</td>
 850             <td class="ssnn top red">
 851               <br />
 852             </td>
 853           </tr>
 854           <tr>
 855             <td class="nnns top capitalize italic red">
 856               <br />
 857             </td>
 858             <td class="nnns top italic red">
 859               <br />
 860             </td>
 861             <td class="snns top red">term_weight ( ♯{?} )</td>
 862             <td class="ssnn top red">
 863               <br />
 864             </td>
 865           </tr>
 866           <tr>
 867             <td class="nnns top capitalize italic red">
 868               <br />
 869             </td>
 870             <td class="nnns top italic red">
 871               <br />
 872             </td>
 873             <td class="snns top red">term</td>
 874             <td class="ssnn top red">
 875               <br />
 876             </td>
 877           </tr>
 878           <tr>
 879             <td class="nnns top capitalize italic red">
 880               <br />
 881             </td>
 882             <td class="snns top italic red">items</td>
 883             <td class="snns top red">item_sd</td>
 884             <td class="ssnn top red">
 885               <br />
 886             </td>
 887           </tr>
 888           <tr>
 889             <td class="nnns top capitalize italic red">
 890               <br />
 891             </td>
 892             <td class="nnns top italic red">
 893               <br />
 894             </td>
 895             <td class="snns top red">item_sh</td>
 896             <td class="ssnn top red">
 897               <br />
 898             </td>
 899           </tr>
 900           <tr>
 901             <td class="nnns top capitalize italic red">
 902               <br />
 903             </td>
 904             <td class="nnns top italic red">
 905               <br />
 906             </td>
 907             <td class="snns top red">item</td>
 908             <td class="ssnn top red">
 909               <br />
 910             </td>
 911           </tr>
 912           <tr>
 913             <td class="nnss top capitalize italic red">
 914               <br />
 915             </td>
 916             <td class="snss top italic red">atomic arities</td>
 917             <td class="snss top red">aarity</td>
 918             <td class="sssn top red">
 919               <br />
 920             </td>
 921           </tr>
 922         </tbody>
 923       </table>
 924     </div>
 925     <div class="spacer">
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 950     </div>
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