Iowa Type Theory Commute

The Stunner: Linear System T is Diverging!


Listen Later

In this episode, I shoot down last episode's proposal -- at least in the version I discussed -- based on an amazing observation from an astonishing paper, "Gödel’s system T revisited", by Alves, Fernández, Florido, and Mackie.  Linear System T is diverging, as they reveal through a short but clever example.  It is even diverging if one requires that the iterator can only be reduced when the function to be iterated is closed (no free variables).  This extraordinary observation does not sink Victor's idea of basing type theory on a terminating untyped core language, but it does sink the specific language he and I were thinking about, namely affine lambda calculus plus structural recursion.


My notes are here.

...more
View all episodesView all episodes
Download on the App Store

Iowa Type Theory CommuteBy Aaron Stump

  • 5
  • 5
  • 5
  • 5
  • 5

5

19 ratings


More shows like Iowa Type Theory Commute

View all
The Changelog: Software Development, Open Source by Changelog Media

The Changelog: Software Development, Open Source

288 Listeners

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas by Sean Carroll | Wondery

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

4,196 Listeners

Interesting Times with Ross Douthat by New York Times Opinion

Interesting Times with Ross Douthat

7,215 Listeners

Tech Won't Save Us by Paris Marx

Tech Won't Save Us

580 Listeners

Dwarkesh Podcast by Dwarkesh Patel

Dwarkesh Podcast

531 Listeners

The Ezra Klein Show by New York Times Opinion

The Ezra Klein Show

16,221 Listeners

The Haskell Interlude by Haskell Podcast

The Haskell Interlude

14 Listeners

Software Unscripted by Richard Feldman

Software Unscripted

29 Listeners

Oxide and Friends by Oxide Computer Company

Oxide and Friends

67 Listeners