Technology
**Type Theory Forall**

An accessible podcast about Type Theory, Programming Languages Research and related
topics.

Latest Episodes:

#14 POPL, Parametricity, Scala, DOT - Nitin and Eric Feb 12, 2022

Show notes

In this episode I gather with two good friends Eric and Nitin to randomly talk random subjects that pops up. Among them we talked about POPL, Scala, Isabelle, Parametricity, Dependent Object Types (DOT, for short) and more!

Links

John's Email: johnw@newartisans.com
John's Twitter: @jwiegley

#12 Tenure, Sexism and ADHD - Talia Ringer Nov 10, 2021

Show notes

Talia Ringer is an Assistant Professor at University of Illinois Urbana-Champaign. She did her PhD at University of Washington with her thesis on Proof Repair.

She’s very active on twitter @taliaringer. And in this episode we will talk about her transition from PhD to Professor, her work on diversity, her ADHD and how it has affected her career so far, and we also touch on the delicate topic of sexism in academia.

Links

#11 FP, Monads, GHC, and beyond - Alejandro Serrano Oct 04, 2021

Show notes

In this episode we have talk with Alejandro Serrano Mena, he works on 47 degrees and is a published author of two books about Haskell: The Book of Monads and Practical Haskell.

We talk about many interesting features behind functional programming such as adts, pattern matching, impredicativity, monads, effects, hacking the ghc and how all this comes together to grab industry attention to adopt functional programming features over the past decade.

Links

#10 Classical Logic vs Intuitionistic Logic - Thorsten Altenkirch and Anupam Das Jul 15, 2021

Show notes

In this episode we host a discussion between Anupam Das and Thorsten Altenkirch on the role of constructivism in mathematics, logic and computer science.

Anupam is a lecturer in the University of Birmingham in the UK, and Thorsten Altenkirch is a CS Professor at the University of Nottingham.

We discuss why constructive content in proofs matters, the law of excluded middle, the axiom of choice, category theory, and much more!

Links

#9 Logic and Proof Theory - Anupam Das May 28, 2021

Show notes

#8 Cedille - Chris Jenkins May 11, 2021

Show notes

In this episode I have a nice conversation with Chris Jenkins to talk about the Cedille theorem prover, based on a very concise type theory called CDLE. The main selling point of Cedille is that the theory is so small that the typing rules fit one page. And yet it is strong enough to do relevant theorem proving. This is probably the most technical episode so far.

Links

#7 Hacking Isabelle's Internals - Dan Matichuk Apr 16, 2021

Show notes

In this episode we dive into Isabelle, the interactive theorem prover based on Higher Order Logic directly from someone who spent quite some time hacking on its internals.

Me and Daniel also talk about Mizar, Isar, the seL4, and how it is formalized.

Torwards the end of the episode we also talk a little about his current work on the binary analysis of Aarch32 Arm Archtecture at Galois.

#6 All The Dumb Questions on Gradual Types - Zeina Migeed Mar 29, 2021

Show notes

In this episode we interview Zeina Migeed, a PhD Student at University of California Los Angeles, advised by Prof. Jens Palsberg

She Researches Gradual Types and had a paper published at POPL'20 named "What is Decidable about Gradual Types". here is a link to it

As the name of the episode suggests, I'll be asking her all the dumb questions related to not only gradual types, but also intersection types and recursive types as well!

#5 The History of Coq'Art - Yves Bertot Feb 27, 2021

Show notes

In this episode we interview Yves Bertot and we talk about the history behind his contribution with Pierre Castéran on writing Coq’Art. What is Yves’ role in the Coq Team, how the team works and what are the sort of contributions they accept.

Links:

Yves email: yves.bertot@inria.fr

Affichage et manipulation interactive de formules mathématiques dans les documents structurés - Check figure 15 for an example on how Yves’ tools would build trees internally

A video showing his tool in practice, doing proofs with mouse clicks

A Genereic Approach to Building User Interfaces for Theorem Provers