html export trial

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jlh 2021-07-19 18:33:17 +01:00
parent 5e06eeb654
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<!DOCTYPE html>
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<head>
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name: HoTTGameLib
include: .
depend: cubical-0.3
flags: --cubical --no-import-sorts

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<div id="content">
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#orgcb7a42f">Planning The HoTT Game</a>
<ul>
<li><a href="#org86f8abf">Aims of the HoTT Game</a></li>
<li><a href="#org891bd67">Barriers</a></li>
<li><a href="#org865979d">Format</a></li>
<li><a href="#org7cb3a5d">Content</a></li>
<li><a href="#org313668c">Debriefs</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-orgcb7a42f" class="outline-2">
<h2 id="orgcb7a42f">Planning The HoTT Game</h2>
<div class="outline-text-2" id="text-orgcb7a42f">
</div>
<div id="outline-container-org86f8abf" class="outline-3">
<h3 id="org86f8abf">Aims of the HoTT Game</h3>
<div class="outline-text-3" id="text-org86f8abf">
<ul class="org-ul">
<li>To get mathematicians with no experience in proof verification interested in HoTT and able to use Agda for HoTT</li>
<li>[?] Work towards showing an interesting result in HoTT</li>
<li>Try to balance hiding cubical implementations whilst exploiting their advantages</li>
</ul>
</div>
</div>
<div id="outline-container-org891bd67" class="outline-3">
<h3 id="org891bd67">Barriers</h3>
<div class="outline-text-3" id="text-org891bd67">
<ul class="org-ul">
<li>HOLD Installation of emacs</li>
<li>TODO Usage of emacs</li>
<li>TODO General type theoretic foundations</li>
<li>TODO Cubical type theory</li>
</ul>
</div>
</div>
<div id="outline-container-org865979d" class="outline-3">
<h3 id="org865979d">Format</h3>
<div class="outline-text-3" id="text-org865979d">
<ul class="org-ul">
<li>[?] Everything done in .agda files</li>
<li>Partially written code with spaces for participants to fill in + answer files</li>
<li>Levels set out with mini-bosses like in Nat Num Game, but with an overall boss</li>
<li>[?] Side quests</li>
<li>References to Harper lectures and HoTT book</li>
</ul>
</div>
</div>
<div id="outline-container-org7cb3a5d" class="outline-3">
<h3 id="org7cb3a5d">Content</h3>
<div class="outline-text-3" id="text-org7cb3a5d">
<ul class="org-ul">
<li>emacs usage</li>
<li>agda usage
<ul class="org-ul">
<li>basic commands (all covered in <a href="https://agda.readthedocs.io/en/v2.6.0.1/getting-started/quick-guide.html">https://agda.readthedocs.io/en/v2.6.0.1/getting-started/quick-guide.html</a>)</li>
<li>recommend doom emacs</li>
<li>implicit/explicit arguments</li>
<li>holes and inferred types</li>
<li><code>_+_</code> vs <code>plus__</code></li>
</ul></li>
<li>type theory basics
<ul class="org-ul">
<li>meta (judgemental/definitional) equality vs internal (propositional) equality
<ul class="org-ul">
<li>function extensionality</li>
</ul></li>
<li>type formation
<ul class="org-ul">
<li>inductive types
<ul class="org-ul">
<li>(side Q) positive and negative constructions of Pi/Sigma types</li>
<li><code>data</code> and <code>record</code></li>
</ul></li>
</ul></li>
<li>universes</li>
<li>recursors / pattern matching</li>
<li>(side Q) some natural number exercises as early evidence of being able to &rsquo;do maths&rsquo;?</li>
<li>different notions of equivalence
<ol class="org-ol">
<li>fibers contractable</li>
<li>quasi-inverse</li>
<li>zig-zag</li>
</ol></li>
<li>(side Q) types are infinity groupoids</li>
<li>extra paths (univalence, fun ext, HITs)</li>
</ul></li>
<li>HoTT
<ul class="org-ul">
<li>basics
<ol class="org-ol">
<li>meta interval, identity type vs path type
<ul class="org-ul">
<li>mention identity type for compatability with other sources, but just use path type</li>
</ul></li>
<li>path type on other types</li>
<li>dependent path type PathP vs path over</li>
<li>univalence</li>
<li>the (non)-issue of J in (Cu)TT</li>
<li>isContr, isProp, isSet</li>
<li>drawing pictures</li>
</ol></li>
<li>Structures, using univalence to transport
<ol class="org-ol">
<li>transporting results between isomorphic structures</li>
</ol></li>
<li>HITs, examples
<ol class="org-ol">
<li>the constructed interval</li>
<li>booleans and covers</li>
<li>S<sup>n</sup></li>
<li>S<sup>1</sup> with 2 cw structures equiv</li>
</ol></li>
<li>Homotopy n-types
<ol class="org-ol">
<li>homotopy levels being closed under type constructions, in particular Set and ETT inside HoTT
<ul class="org-ul">
<li>in particular sigma types</li>
</ul></li>
</ol></li>
</ul></li>
</ul>
</div>
</div>
<div id="outline-container-org313668c" class="outline-3">
<h3 id="org313668c">Debriefs</h3>
<div class="outline-text-3" id="text-org313668c">
<ul class="org-ul">
<li>2021 July 15; Homotopy n-types
<ul class="org-ul">
<li>watched (Harper) lecture 15 on Sets being closed under type formations -&gt;- motivates showing in Agda Sets closed under Sigma.</li>
<li>Harper does product case, claiming sigma case follows analogously,</li>
<li>attempt proof in Cubical Agda but highly non-obvious how to use that fibers are Sets.</li>
<li>difficulty is that PathP not in one fiber, but PathOver is, AND PathOver &lt;-&gt; PathP NON-obvious</li>
<li>Easy to generalize situation to n-types being closed under Sigma (7.1.8 in HoTT book), we showed this assuming PathPIsoPath</li>
</ul></li>
</ul>
</div>
</div>
</div>
</div>
<div id="postamble" class="status">
<p class="author">Author: JLH KL</p>
<p class="date">Created: 2021-07-19 Mon 18:31</p>
</div>
</body>
</html>

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Plan.md
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# Planning The HoTT Game
## Aims of the HoTT Game # Table of Contents
- To get mathematicians with no experience in proof verification interested in HoTT and able to use Agda for HoTT
- [?] Work towards showing an interesting result in HoTT
- Try to balance hiding cubical implementations whilst exploiting their advantages
## Barriers 1. [Aims of the HoTT Game](#org45da28b)
- HOLD Installation of emacs 1. [To get mathematicians with no experience in proof verification interested in HoTT and able to use Agda for HoTT](#org6c86aa4)
- TODO Usage of emacs 2. [Work towards showing an interesting result in HoTT](#org5c370bf)
- TODO General type theoretic foundations 3. [Try to balance hiding cubical implementations whilst exploiting their advantages](#org2cc236e)
- TODO Cubical type theory 2. [Barriers](#org483c28e)
1. [Installation of emacs](#orgfaee064)
2. [Usage of emacs](#org4ec8663)
3. [General type theoretic foundations](#orgd6212c3)
4. [Cubical type theory](#orgdb053bf)
<a id="org45da28b"></a>
# Aims of the HoTT Game
<a id="org6c86aa4"></a>
## To get mathematicians with no experience in proof verification interested in HoTT and able to use Agda for HoTT
<a id="org5c370bf"></a>
## [?] Work towards showing an interesting result in HoTT
<a id="org2cc236e"></a>
## Try to balance hiding cubical implementations whilst exploiting their advantages
<a id="org483c28e"></a>
# Barriers
<a id="orgfaee064"></a>
## HOLD Installation of emacs
<a id="org4ec8663"></a>
## TODO Usage of emacs
<a id="orgd6212c3"></a>
## TODO General type theoretic foundations
<a id="orgdb053bf"></a>
## TODO Cubical type theory
\## Format
## Format
- [?] Everything done in .agda files - [?] Everything done in .agda files
- Partially written code with spaces for participants to fill in + answer files - Partially written code with spaces for participants to fill in + answer files
- Levels set out with mini-bosses like in Nat Num Game, but with an overall boss - Levels set out with mini-bosses like in Nat Num Game, but with an overall boss
- [?] Side quests - [?] Side quests
- References to Harper lectures and HoTT book - References to Harper lectures and HoTT book
# Content <!&#x2013; listing topics we have pursued, NO ordering &#x2013;>
<!-- listing topics we have pursued, NO ordering -->
- emacs usage - emacs usage
- agda usage - agda usage
- basic commands (all covered in https://agda.readthedocs.io/en/v2.6.0.1/getting-started/quick-guide.html) - basic commands (all covered in <https://agda.readthedocs.io/en/v2.6.0.1/getting-started/quick-guide.html>)
- recommend doom emacs? -> basic doom usage and command differences with nude agda. - recommend doom emacs
- implicit/explicit arguments - implicit/explicit arguments
- holes and inferred types - holes and inferred types
- `_+_` and `plus__` - \`\_+\_\` and \`plus\_\_\`
- type theory basics - type theory basics
- meta (judgemental/definitional) equality vs internal (propositional) equality - meta (judgemental/definitional) equality vs internal (propositional) equality
- function extensionality - function extensionality
- type formation - type formation
- universes
- recursors / pattern matching
- (side Q) some natural number exercises as early evidence of being able to 'do maths'?
- different notions of equivalence
a) fibers contractable
b) quasi-inverse
c) zig-zag
- (side Q) types are infinity groupoids
- inductive types - inductive types
- (side Q) positive and negative constructions of Pi/Sigma types - (side Q) positive and negative constructions of Pi/Sigma types
- `data` and `record` - \`data\` and \`record\`
- universes
- recursors / pattern matching
- (side Q) some natural number exercises as early evidence of being able to &rsquo;do maths&rsquo;?
- different notions of equivalence
1. fibers contractable
2. quasi-inverse
3. zig-zag
- (side Q) types are infinity groupoids
- extra paths (univalence, fun ext, HITs)
- HoTT - HoTT
- basics - basics
a) meta interval, identity type vs path type 1. meta interval, identity type vs path type
- mention identity type for compatability with other sources, but just use path type - mention identity type for compatability with other sources, but just use path type
b) path type on other types 2. path type on other types
c) dependent path type PathP vs path over 3. dependent path type PathP vs path over
d) univalence 4. univalence
e) the (non)-issue of J in (Cu)TT 5. the (non)-issue of J in (Cu)TT
f) isContr, isProp, isSet 6. isContr, isProp, isSet
g) drawing pictures 7. drawing pictures
- Structures, univalence and transport - Structures, using univalence to transport
a) transporting results between isomorphic structures 1. transporting results between isomorphic structures
- HITs, examples - HITs, examples
a) the constructed interval 1. the constructed interval
b) booleans and covers 2. booleans and covers
c) S^n 3. S<sup>n</sup>
d) 4. S<sup>1</sup> with 2 cw structures equiv
- Homotopy n-types - Homotopy n-types
a) homotopy levels being closed under type constructions, in particular Set and ETT inside HoTT 1. homotopy levels being closed under type constructions, in particular Set and ETT inside HoTT
* in particular sigma types - in particular sigma types
# Debriefs
- 2021 July 15; Homotopy n-types - 2021 July 15; Homotopy n-types
- watched (Harper) lecture 15 on Sets being closed under type formations ->- motivates showing in Agda Sets closed under Sigma. - watched (Harper) lecture 15 on Sets being closed under type formations ->- motivates showing in Agda Sets closed under Sigma.
- Harper does product case, claiming sigma case follows analogously, - Harper does product case, claiming sigma case follows analogously,
- attempt proof in Cubical Agda but highly non-obvious how to use that fibers are Sets. - attempt proof in Cubical Agda but highly non-obvious how to use that fibers are Sets.
- difficulty is that PathP not in one fiber, but PathOver is, AND PathOver <-> PathP NON-obvious - difficulty is that PathP not in one fiber, but PathOver is, AND PathOver <-> PathP NON-obvious
- Easy to generalize situation to n-types being closed under Sigma (7.1.8 in HoTT book), we showed this assuming PathPIsoPath - Easy to generalize situation to n-types being closed under Sigma (7.1.8 in HoTT book), we showed this assuming PathPIsoPath

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# Planning The HoTT Game #+OPTIONS: num:nil
#+AUTHOR: JLH
#+AUTHOR: KL
## Aims of the HoTT Game * Planning The HoTT Game
- To get mathematicians with no experience in proof verification interested in HoTT and able to use Agda for HoTT
- [?] Work towards showing an interesting result in HoTT
- Try to balance hiding cubical implementations whilst exploiting their advantages
## Barriers ** Aims of the HoTT Game
- HOLD Installation of emacs - To get mathematicians with no experience in proof verification interested in HoTT and able to use Agda for HoTT
- TODO Usage of emacs - [?] Work towards showing an interesting result in HoTT
- TODO General type theoretic foundations - Try to balance hiding cubical implementations whilst exploiting their advantages
- TODO Cubical type theory
## Format ** Barriers
- [?] Everything done in .agda files - HOLD Installation of emacs
- Partially written code with spaces for participants to fill in + answer files - TODO Usage of emacs
- Levels set out with mini-bosses like in Nat Num Game, but with an overall boss - TODO General type theoretic foundations
- [?] Side quests - TODO Cubical type theory
- References to Harper lectures and HoTT book
# Content ** Format
<!-- listing topics we have pursued, NO ordering --> - [?] Everything done in .agda files
- Partially written code with spaces for participants to fill in + answer files
- Levels set out with mini-bosses like in Nat Num Game, but with an overall boss
- [?] Side quests
- References to Harper lectures and HoTT book
** Content
# listing topics we have pursued, NO ordering
- emacs usage - emacs usage
- agda usage - agda usage
- basic commands (all covered in https://agda.readthedocs.io/en/v2.6.0.1/getting-started/quick-guide.html) - basic commands (all covered in https://agda.readthedocs.io/en/v2.6.0.1/getting-started/quick-guide.html)
- recommend doom emacs? -> basic doom usage and command differences with nude agda. - recommend doom emacs
- implicit/explicit arguments - implicit/explicit arguments
- holes and inferred types - holes and inferred types
- `_+_` and `plus__` - src_elisp{(_+_)} and src_elisp{(plus__)}
- type theory basics - type theory basics
- meta (judgemental/definitional) equality vs internal (propositional) equality - meta (judgemental/definitional) equality vs internal (propositional) equality
- function extensionality - function extensionality
@ -64,7 +68,7 @@
a) homotopy levels being closed under type constructions, in particular Set and ETT inside HoTT a) homotopy levels being closed under type constructions, in particular Set and ETT inside HoTT
* in particular sigma types * in particular sigma types
# Debriefs ** Debriefs
- 2021 July 15; Homotopy n-types - 2021 July 15; Homotopy n-types
- watched (Harper) lecture 15 on Sets being closed under type formations ->- motivates showing in Agda Sets closed under Sigma. - watched (Harper) lecture 15 on Sets being closed under type formations ->- motivates showing in Agda Sets closed under Sigma.
- Harper does product case, claiming sigma case follows analogously, - Harper does product case, claiming sigma case follows analogously,