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Andrés Villaveces Niño

@andresvillaveces@mathstodon.xyz
mastodon 4.6.4
  • Open on mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions.

I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place.

I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

188 Followers
166 Following
13 Posts
Joined November 13, 2022
Webpage:
https://avillavecesn.net
Personal Blog:
https://atsmi.wordpress.com
Affiliation:
Universidad Nacional de Colombia

Posts

Open post
andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · May 21, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

OpenAI acaba de anunciar que uno de sus modelos logró refutar la conjetura de las distancias unitarias de Erdős.
Los matemáticos que revisaron la demostración señalan que no es un acierto por mera fuerza bruta, se trata de una generalización bastante ingeniosa de la construcción original de Erdős. Al parecer, la ventaja clave de la IA radicó en su poder de correlación para conectar de forma natural herramientas de áreas distintas (en este caso, la geometría discreta y la teoría algebraica de números). Señalan que es previsible que la IA, al explotar estas correlaciones entre áreas distintas de su enorme base de datos (casi toda la matemática publicada), empiece a obtener resultados novedosos conectando campos lejanos. (Lo anterior, escrito por John Jaime Rodríguez, colega mío en la UNAL.)

Agrego: Un logro impresionante para una IA. El artículo parece [hasta donde veo] invocar el "modelo interno" de OpenAI para hacer una construcción de un campo que termina dando el contraejemplo. La historia tiene gente muy ilustre: Erdős lanza la conjetura en 1946, con una cota específica demostrada, que luego mejoran personas como Spencer, Szemeredy entre otros. En 2010, Guth y Katz mejoran de manera impresionante la cota. Pero ahora la conjetura original de Erdős se cae, con la construcción ayudada de manera esencial por la IA.

Aquí un enlace al blog de combinatoria de Gil Kalai, donde se discute lo anterior:

https://gilkalai.wordpress.com/2026/05/21/amazing-erdos-unit-distance-problem-was-disproved-it-was-achieved-by-ai

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Apr 28, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Here, by French mathematician David Bessis, an extremely thought-provoking essay on the current deep change in what he calls the "theorem economy". Bessis takes issue with some claims by Geoffrey Hinton and also partially with some by Terry Tao. Beyond that, he offers some possible ways of dealing with the issue (he also takes a very critical look at what he terms "Hardy's curse", the brutal centrality of theorem proving in mathematics).

An extraordinary writing.

https://davidbessis.substack.com/p/the-fall-of-the-theorem-economy

The fall of the theorem economy
davidbessis.substack.com

The fall of the theorem economy

How AI could destroy mathematics and barely touch it

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Apr 15, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Michael Rabin (Israeli mathematician, computer scientist, and recipient with Dana Scott of the 1976 ACM Turing Award for their work on computational complexity, also Saharon Shelah's doctoral advisor at the Hebrew University of Jerusalem, and later professor at Harvard University) has passed away. Honored be his memory.

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Mar 23, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

With María Clara Cortés, we will participate this coming Thursday and Friday in the event Pedestrian Space, at the Boston University Center for the Humanities.

Our lecture will be given from Bogotá (we are both invited in person to Boston University, but we decided a few months ago to decline being physically present in the United States for this conference, considering especially the horrific situation with crossing borders at this time in history). The organizers gracefully accepted our request to give the lecture from here. We will miss the fantastic opportunity to be in Boston, a city we both like very much, and being fully invited for a few days. But we believe this is a moment in history when such decisions may be important, at least for us.

We will give ONE lecture together, called

Transits on Pedestrian Space: from factual to critical; a conversation between a mathematician and an artist.

Our lecture will be on Thursday morning.

https://www.bu.edu/humanities/pedestrian-space/

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Mar 16, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Mathematicians: please consider signing this petition to move the ICM 2026 out of the United States.

https://docs.google.com/forms/d/e/1FAIpQLSdHJhc8X83b8oL6rH2KDX0I730eraum5I8_IlWY23F82mHuag/viewform?

Google Docs

Move the 2026 ICM out of the United States (click for new website)

We, the undersigned mathematicians, call on the IMU to reconsider its decision to hold the 2026 International Congress of Mathematicians in the United States this coming July. We rely heavily on the i

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Mar 10, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Con mucho orgullo, con mucha felicidad, con mucha participación de varias generaciones, celebramos nuestros 70 años del Departamento de Matemáticas, Universidad Nacional de Colombia el viernes pasado.

¡Mil gracias a todos/as quienes hicieron posible esta construcción de siete décadas, y esta celebración tan bella! Las fotos capturan la auténtica y profunda felicidad de ese día, de tantas edades distintas compartiendo un momento importante.

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Feb 19, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

📐 DiscreMath invita

Este miércoles 25 de febrero (10:00 a.m.–1:00 p.m.), jornada de charlas cortas con László Szalay y László Németh, en el marco del convenio UNAL–Universidad de Sopron.

📍 Auditorio Juan Herkrath Müller
🔗 Inscripción: seguir QR

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Feb 12, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Un curso de extensión en la Universidad Nacional de Colombia (Departamento de Matemáticas)

A cargo de Juan Daniel López Castaño - estudiante de doctorado en Johns Hopkins, egresado de Matemáticas y Ciencias de la Computación de la Universidad Nacional de Colombia.

Pensamiento geométrico para machine learning y ciencias de datos.

Fortalece tus bases matemáticas y comprende cómo la geometría juega un papel clave en el análisis de datos y los algoritmos de machine learning.
📅 Del 9 al 13 de marzo de 2026
🧑‍🏫Modalidad: híbrido
🎯 Dirigido a: estudiantes, profesionales e interesados en ciencia de datos y machine learning.

https://ciencias.bogota.unal.edu.co/educacion_continua/cursos_diplomados_eventos/curso-de-pensamiento-geometrico-para-machine-learning-y-ciencias-de-datos/

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Feb 01, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

With María Clara Cortés, we will participate in this event (Pedestrian Space) at the Center for the Humanities, Boston University: https://www.bu.edu/humanities/pedestrian-space/

The event is connected to The MA Collective (MA for Mathematics and Arts, but also as a tribute to MA (an important maximality principle) in set theory).

We will not travel to Boston this time (although we were invited): we will speak remotely, from Bogotá. We decided this several months ago, when travel to the USA became a hazardous issue.

Our lectures for Pedestrian Space will address the problem raised by Fred Sandback's thought and art works: the issue of the space of sculpture made _pedestrian_ by allowing the viewer to enter the sculpture, to become part of it.

We will take issue with this problem, from art and mathematics perspectives, and the inherent politics of pedestrian space.

There will also be a screening of two artworks by María Clara Cortés, on a wall in Boston, for 24 hours (see the webpage for details): Río Magdalena and Tribute to Fred Sandback.

https://www.bu.edu/humanities/pedestrian-space/

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Jan 30, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Good news: my book on forcing, in Spanish (A través del universo - Una guía a los axiomas conjuntistas, consistencia, forcing e independencia) has appeared!

The book (a result of teaching several times forcing in various places) was beautifully published by Editorial Universidad Nacional de Colombia (Facultad de Ciencias) and Editorial Universidad El Bosque.

Your browser does not support the video tag.
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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Jan 09, 2026
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Celebramos el Día Mundial de la Lógica 2026 en Bogotá el 16 de enero la próxima semana/
We celebrate World Logic Day 2026 in Bogotá on 16 January, next week:

​Lectures by / conferencias de

Juliette Kennedy (University of Helsinki)
Jouko Väänänen (University of Helsinki)
Fernando Zalamea (Universidad Nacional de Colombia)

​See info here:

https://sites.google.com/view/bogotalogica/eventos/logic-day-bogot%C3%A1?authuser=0

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Oct 31, 2025
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

Asaf Karagila gives a very basic (and very effective; as Santi Spadaro says, Asaf should be on prime-time TV) account on ordinal numbers.

https://www.youtube.com/watch?v=47qEMTMKRdA

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andresvillaveces
Andrés Villaveces Niño @andresvillaveces@mathstodon.xyz · Oct 20, 2025
Andrés Villaveces Niño
@andresvillaveces@mathstodon.xyz

I work in Model Theory and its interactions with other parts of mathematics. Usually, Abstract Elementary Classes, Infinitary Logic, and their connections with Set Theory and the model theory of analytic functions. I also have a non-math mastodon account (avillavecesn@col.social) where I comment other topics. If you'd rather only follow the math posts, this is your place. I write a daily very basic thread on the Muisca Language (a language revival project): #MyskkubunMatutino

mathstodon.xyz

A Colloquium Lecture on interactions between Model Theory and the Foundations of Physics, by Boris Zilber,at UNAL, today (4 pm, Colombia time):

https://meet.google.com/cnc-ohtg-wiv

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