Readings shared April 4, 2026 The readings shared in Bluesky on 4 April 2026 are: Why Lean?. ~ Leonardo de Moura. #LeanProver #ITP A formalization of the Gelfond-Schneider theorem. ~ Michail Karatarakis, Freek Wiedijk. #LeanProve

Readings shared April 4, 2026. jaalonso.github.io/vestigium/po... #AI #AI4Math #ATP #Agda #Autoformalization #CategoryTheory #CoqProver #FunctionalProgramming #ITP #IsabelleHOL #LLMs #LambdaCalculus #LeanProver #Lisp #Logic #LogicProgramming #LLMs #Math #Programming #Prolog #Racket #RocqProver

Category theory illustrated: Types. ~ Jencel Panic. abuseofnotation.github.io/category-the... #CategoryTheory #Math

The participants of PSSL 112 are standing on a patch of grass in sunny conditions.

Thanks to our speakers and @Stiephen all the slides for PSSL 112 are now available on the PSSL website! https://sites.google.com/view/pssl112/program

#CategoryTheory #Logic

Published a new chapter of #categorytheoryillustrated - Types

abuseofnotation.github.io/category-theory-illustra...

#categorytheory #mathematics #haskell

Readings shared March 29, 2026 The readings shared in Bluesky on 29 March 2026 are: Embracing AI and formalization: Experimenting with tomorrow’s mathematical tools. ~ Jarod Alper. #AI4Math #LeanProver #ITP #Math On the paucity of

Readings shared March 29, 2026. jaalonso.github.io/vestigium/po... #AI #AI4Math #CategoryTheory #ITP #LeanProver #Logic #Math #Programming

Formally verifying digital circuits with category theory in Lean. ~ Matt Hunzinger. matt.hunzinger.me/2026/03/28/c... #LeanProver #ITP #CategoryTheory

RE: https://fosstodon.org/@zurihac/116040336310097135

Come meet me there!

#categorytheory #haskell

🎉 Introducing: CatDat - A comprehensive database of categories and their properties. Built with SvelteKit and SQLite. Made for mathematicians who love category theory.

🔗 Link: catdat.app

👀 Demo: youtu.be/dQXbPxk__qA

#svelte #mathematics #categorytheory

Generalized Inverses of Quantum Channels: A Categorical Perspective

Using category theory, researchers prove the Drazin inverse of any TP quantum channel is TP, and show Moore-Penrose inverses of unital quantum channels are both TP and unital—opening new avenues for quantum error mitigation.

#QuantumErrorMitigation #CategoryTheory #Research

ACT 2025: Eighth International Conference on Applied Category Theory Proceedings

ACT 2025 at University of Florida featured 34 talks bridging pure math and applied fields — spanning quantum computation, string diagrams, game semantics, probability theory, and chemistry via category-theoretic frameworks.

#CategoryTheory #QuantumComputation #Research

Picture of Sydney Sweeney and William Lawvere and the text: "Sydney Sweeney reveals in an interview that she rejects Lawvere's implicit assertion that Hegel's dialectics is given by adjoint functors in category theory. "He never rigorously formalized it...it's not even clear it's formalizable." She adds: "Everyone knows that the only useful operationalization of Hegel's dialectics is Marx transforming it into a tool for praxis as dialectical materialism.”

#maths #math #lawvere #philosophy #hegel #categorytheory #marx #dialecticmaterialism

NITheCS Mathematical Structures Mini-course: ‘Tangent Categories’ – Dr Marcello Lanfranchi (Macquarie University, Australia)
📅 Thurs, 12 March 2026
🕑 14h00–16h00 SAST
📍 Attend online or in person
buff.ly/klbsBBl
#CategoryTheory #DifferentialGeometry #MathematicalStructures #TheoreticalMathematics

Readings shared March 9, 2026 The readings shared in Bluesky on 9 March 2026 are: Fantastic simprocs and how to write them. ~ Yaël Dillies, Paul Lezeau. #LeanProver #ITP Formalization in Lean of faithfully flat descent of project

Readings shared March 09, 2026. jaalonso.github.io/vestigium/po... #AI #AI4Math #CategoryTheory #CoqProver #Emacs #FunctionalProgramming #Haskell #ITP #IsabelleHOL #LambdaCalculus #LeanProver #Lisp #Math #Physics #RocqProver

Can the Most Abstract Math Make the World a Better Place? | Quanta Magazine Columnist Natalie Wolchover explores whether applied category theory can be “green” math.

Can the most abstract math make the world a better place? ~ Natalie Wolchover www.quantamagazine.org/can-the-most... #CategoryTheory #Math

Category Theory for Programming In these lecture notes, we give a brief introduction to some elements of category theory. The choice of topics is guided by applications to functional programming. Firstly, we study initial algebras, ...

Category theory for programming. ~ Benedikt Ahrens, Kobe Wullaert. arxiv.org/abs/2209.012... #CategoryTheory #Haskell #LeanProver #FunctionalProgramming

It is a legit proof procedure - both in philosophy and math! 😝

In math, "abstract nonsense" is mathematical #categorytheory.

In philosophy, it's just #philosophy. 😝 plato.stanford.edu/entries/cate...

The fix: set processing order in AI settings.
1. select the morphism (direction of meaning)
2. clarify the category (scope)
3. identify the objects (key concepts)
4. choose expression last
Never start from 4. Rewrite = forbidden.

#CategoryTheory #Morphism

Original post on social.sciences.re

Excited to announce the Call for Contributions for the inaugural Workshop on Diagrams in Logic and Computation (DIALOCO)!

📍 Affiliated with FLoC 26
🗓️ July 19, 2026 | Lisbon, 🇵🇹

If you work on string diagrams, proof nets, visual proof assistants, or any other use of diagrammatic methods in […]

Original post on mathstodon.xyz

The program for the 112th Peripatetic Seminar on Sheaves and Logic (PSSL 112) is up on the website https://sites.google.com/view/pssl112/program
17 talks on #CategoryTheory (and #TypeTheory) from a variety of speakers!

If you'd like to attend please register by March 14th following the form on […]

Starting a new video series on #CategoryTheory. Please provide feedback. Brickbats welcome, especially of the constructive kind! #FunctionalProgramming

www.youtube.com/watch

Starting a new video series on #CategoryTheory. Please provide feedback. Brickbats welcome, especially of the constructive kind! #FunctionalProgramming

www.youtube.com/watch?v=aKIu...

Category Theory overview Top-down Concept map based on Gemini interaction Feb 2026 using Gene Bellinger's AI prompts SHort Topos Video See Richard Southwell series Category Theory for beginners philosophy video  , long ...

insightmaker.com/insight/548g... #math #categorytheory

RE: https://fosstodon.org/@zurihac/116040294275089930

I will be speaking about #categorytheory at ZuriHac 2026!

there's your sign

"""
Ladies and Gentleman, the Yoneda Lemon
"""
--- the MC, to a group of women and one guy at the back that wandered in off the street

#mathematics #computerscience #physics #biology #python #sdlc #categorytheory #heresthefunctor

RE: https://mathstodon.xyz/@de_Jong_Tom/115966213949890726

PSSL deadline for abstracts is *this Friday*.
#CategoryTheory

#math #vlog
#categorytheory

Original post on mathstodon.xyz

Together with @Stiephen and Simona Paoli, I'm organizing the 112th Peripatetic Seminar on Sheaves and Logic (PSSL 112) in Nottingham on 28—29 March 2026.
https://sites.google.com/view/pssl112/

Talks at PSSL cover all areas of #CategoryTheory and its applications.

If you'd like to contribute […]

Heyting algebra in nLab

Corrolary: A Heytung algebra (i.e. boolean algebra without excluded middle) is almost the same as Cartesian Closed Category

(https://ncatlab.org/nlab/show/Heyting%2Balgebra

#categorytheory #math

Screenshot from wikipedia, the counit of the tensor hom adjunction: Hom(X, Z) x X -> Z

Random #categorytheory fact:

The counit of the tensor-hom adjunction is modus ponens:

Hom(X, Z) x X -> Z

(Hom(X, Z) is the homomorphism object between X and Z, roughly, the set of arrows from one to the other)

I still wonder how to explain it in #categorytheoryillustrated)

We are bankrupting the world by mapping reality to a ledger that is mathematically too small to hold it. We quantify the minor part of existence and map everything else to zero.

@jamesowenweatherall.com @mathyawp.bsky.social

#Economics #ComplexityScience #SystemsThinking #CategoryTheory