Daniel Litt
@littmath.bsky.social
Assistant professor (of mathematics) at the University of Toronto. Algebraic geometry, number theory, forever distracted and confused, etc. He/him.
Pinned
Daniel Litt
@littmath.bsky.social
· Jan 24
Yeuk Hay Joshua Lam, Daniel Litt
Algebraicity and integrality of solutions to differential equations
https://arxiv.org/abs/2501.13175
Algebraicity and integrality of solutions to differential equations
https://arxiv.org/abs/2501.13175
I want to explain in down-to-earth terms what this paper is about, since it ultimately boils down to what I think are some really concrete and fundamental questions. 1/n
Toddler refused to eat her cheese after slightly tearing it, demanding I tape it back together. After some negotiation she was satisfied with me using “avocado tape,” i.e. laying thin slices of avocado over the tear.
January 18, 2026 at 12:29 AM
Toddler refused to eat her cheese after slightly tearing it, demanding I tape it back together. After some negotiation she was satisfied with me using “avocado tape,” i.e. laying thin slices of avocado over the tear.
Very happy to finally have this paper out!
Yeuk Hay Joshua Lam, Daniel Litt: p-Curvature and Non-Abelian Cohomology https://arxiv.org/abs/2601.07933 https://arxiv.org/pdf/2601.07933 https://arxiv.org/html/2601.07933
January 15, 2026 at 2:50 AM
Very happy to finally have this paper out!
Reposted by Daniel Litt
Yeuk Hay Joshua Lam, Daniel Litt: p-Curvature and Non-Abelian Cohomology https://arxiv.org/abs/2601.07933 https://arxiv.org/pdf/2601.07933 https://arxiv.org/html/2601.07933
January 14, 2026 at 6:37 AM
Yeuk Hay Joshua Lam, Daniel Litt: p-Curvature and Non-Abelian Cohomology https://arxiv.org/abs/2601.07933 https://arxiv.org/pdf/2601.07933 https://arxiv.org/html/2601.07933
New MathOverflow questions each month since the site's beginning. Decline seems to start in ~2021 (due to site moderation changes?), with a notably steeper decline in 2025, since the advent of reasoning models.
January 5, 2026 at 7:13 PM
New MathOverflow questions each month since the site's beginning. Decline seems to start in ~2021 (due to site moderation changes?), with a notably steeper decline in 2025, since the advent of reasoning models.
Reposted by Daniel Litt
I find it hard to square the preciousness about "why would someone ever stay on Twitter?" when everyone on this site knows that the community here intentionally chased off lots of people.
January 5, 2026 at 5:41 PM
I find it hard to square the preciousness about "why would someone ever stay on Twitter?" when everyone on this site knows that the community here intentionally chased off lots of people.
Reposted by Daniel Litt
Alice and Bob on 𝕏: Reversal, Coupling, Renewal
@joinmaa.bsky.social @tandfresearch.bsky.social www.tandfonline.com/doi/full/10....
@joinmaa.bsky.social @tandfresearch.bsky.social www.tandfonline.com/doi/full/10....
Alice and Bob on 𝕏: Reversal, Coupling, Renewal
A neat question involving coin flips surfaced on X, and generated an intensive “storm” of “social mathematics.” In a sequence of flips of a fair coin, Alice wins a point at each appearance of two c...
www.tandfonline.com
December 6, 2025 at 1:13 PM
Alice and Bob on 𝕏: Reversal, Coupling, Renewal
@joinmaa.bsky.social @tandfresearch.bsky.social www.tandfonline.com/doi/full/10....
@joinmaa.bsky.social @tandfresearch.bsky.social www.tandfonline.com/doi/full/10....
Much more true now than it was 6 months ago.
If the last time you tried to use an LLM for math was ~4 or 5 months ago it’s worth firing up Gemini 2.5 (which you can try for free) or ChatGPT o3 and getting a sense of how rapidly things have progressed.
December 9, 2025 at 12:16 AM
Much more true now than it was 6 months ago.
new trolley problem just dropped: Elon vs. 10^58 randomly chosen people. let's see what Grok has to say
November 21, 2025 at 3:43 PM
new trolley problem just dropped: Elon vs. 10^58 randomly chosen people. let's see what Grok has to say
Reposted by Daniel Litt
Congratulations to the forty mathematical scientists named Fellows of the American Mathematical Society for 2026. Recognized by their peers, AMS Fellows have made outstanding contributions to the creation, exposition, advancement, communication, and utilization of mathematics.
October 31, 2025 at 4:45 PM
Congratulations to the forty mathematical scientists named Fellows of the American Mathematical Society for 2026. Recognized by their peers, AMS Fellows have made outstanding contributions to the creation, exposition, advancement, communication, and utilization of mathematics.
We finally have a proof of Fermat’s last theorem that fits in a margin, achieving the dream of centuries of mathematicians. Namely, “by [TayWi95]…”
October 20, 2025 at 4:18 PM
We finally have a proof of Fermat’s last theorem that fits in a margin, achieving the dream of centuries of mathematicians. Namely, “by [TayWi95]…”
Experiencing extreme levels of “someone is wrong on the internet” today.
October 18, 2025 at 2:18 AM
Experiencing extreme levels of “someone is wrong on the internet” today.
Oh, you have criticisms of my paper? Surely you noticed the part of the paper where we already rebutted your critique, by writing “Possible criticisms: the methodology of this paper is bad. We are aware of this.”
September 30, 2025 at 1:52 AM
Oh, you have criticisms of my paper? Surely you noticed the part of the paper where we already rebutted your critique, by writing “Possible criticisms: the methodology of this paper is bad. We are aware of this.”
it’s time for universities to return to their core mission (acting as the settings of novels by middle-aged professors about the midlife crises of middle-aged professors)
September 14, 2025 at 3:04 AM
it’s time for universities to return to their core mission (acting as the settings of novels by middle-aged professors about the midlife crises of middle-aged professors)
it’s time for universities to return to their core mission (an escalating series of pranks played by a trouble-making fraternity on the straight-edge dean who will stop at nothing to shut them down)
September 14, 2025 at 1:45 AM
it’s time for universities to return to their core mission (an escalating series of pranks played by a trouble-making fraternity on the straight-edge dean who will stop at nothing to shut them down)
Reposted by Daniel Litt
they have a great 4-lecture mini-course about local systems on algebraic variables. highly recommended that you attend. will cure depression, life changing
September 13, 2025 at 1:37 AM
they have a great 4-lecture mini-course about local systems on algebraic variables. highly recommended that you attend. will cure depression, life changing
Going to Padua next week to give a 4-lecture mini-course on “Local Systems on Algebraic Varieties.” Apparently the university is quite old—if anyone knows any math- or science-related sights there that I should check out, please let me know.
September 13, 2025 at 1:33 AM
Going to Padua next week to give a 4-lecture mini-course on “Local Systems on Algebraic Varieties.” Apparently the university is quite old—if anyone knows any math- or science-related sights there that I should check out, please let me know.
Reposted by Daniel Litt
Have you in your field seen a lot of LLM-assisted papers on the ArXiV claiming to solve an open problem?
I hear @littmath.bsky.social report a lot of "proofs" of the Hodge conjecture, but I haven't heard anyone about other open problems. Have you heard about YM mass gap? Riemann hypothesis? P=NP?
I hear @littmath.bsky.social report a lot of "proofs" of the Hodge conjecture, but I haven't heard anyone about other open problems. Have you heard about YM mass gap? Riemann hypothesis? P=NP?
September 10, 2025 at 2:36 PM
Have you in your field seen a lot of LLM-assisted papers on the ArXiV claiming to solve an open problem?
I hear @littmath.bsky.social report a lot of "proofs" of the Hodge conjecture, but I haven't heard anyone about other open problems. Have you heard about YM mass gap? Riemann hypothesis? P=NP?
I hear @littmath.bsky.social report a lot of "proofs" of the Hodge conjecture, but I haven't heard anyone about other open problems. Have you heard about YM mass gap? Riemann hypothesis? P=NP?
back on the good stuff (geodesic dome tourism)
August 23, 2025 at 11:28 PM
back on the good stuff (geodesic dome tourism)
Heading to Fort Collins for the once-a-decade algebraic geometry summer research institute. Please say hi if you’re around! (And come to my talk tomorrow on “p-curvature and non-abelian cohomology”!)
July 27, 2025 at 8:07 PM
Heading to Fort Collins for the once-a-decade algebraic geometry summer research institute. Please say hi if you’re around! (And come to my talk tomorrow on “p-curvature and non-abelian cohomology”!)
Reposted by Daniel Litt
I've been working on a new tool, Refine, to make scholars more productive. If you're interested in being among the very first to try the beta, please read on.
Refine leverages the best current AI models to draw your attention to potential errors and clarity issues in research paper drafts.
1/
Refine leverages the best current AI models to draw your attention to potential errors and clarity issues in research paper drafts.
1/
July 24, 2025 at 3:24 AM
I've been working on a new tool, Refine, to make scholars more productive. If you're interested in being among the very first to try the beta, please read on.
Refine leverages the best current AI models to draw your attention to potential errors and clarity issues in research paper drafts.
1/
Refine leverages the best current AI models to draw your attention to potential errors and clarity issues in research paper drafts.
1/
at 10,000 followers I will reveal the title of my Grothendieck biopic screenplay
July 25, 2025 at 1:03 AM
at 10,000 followers I will reveal the title of my Grothendieck biopic screenplay
planning to use this picture in a talk to explain what a foliation is, feeling extremely Canadian
July 24, 2025 at 3:46 PM
planning to use this picture in a talk to explain what a foliation is, feeling extremely Canadian
Giving a slide talk next week—thinking of trying something other than Beamer. Any recommendations for software for beautiful math talks?
July 22, 2025 at 1:17 AM
Giving a slide talk next week—thinking of trying something other than Beamer. Any recommendations for software for beautiful math talks?