[This is a guest post by Grant Sanderson. This blog post was initially written in a different file format and converted using AI. — T.] A sentiment echoing throughout the mathematics communit…

433 points•num42•12 days ago•285 comments•

285 comments

ForgotMyUUID12 days ago
I’m reminded of that famous debate between Poincaré and Hilbert at the International Congress of Mathematicians in Paris in 1900. It was then that everyone decided to follow Hilbert’s path, and proof came to be valued more than intuition. I think modern math at school and at applied university kind of lost this intuitive part.

I try to teach my students that mathematics is, first and foremost, a very precise language of communication. It’s sometimes amusing to ask those who don’t like math to do without it entirely, just to see how much harder it becomes to describe the things around them.

Second thing I tell them, formulas are the essence of mechanisms in their purest form. And in this form, they’re much easier to grasp and mentally manipulate. It always amused me, after taking a mechanics course, to imagine that for any formula, you could visualize a mechanism or process that implements it.

And third thing, I suppose, the ability to verify one’s own statements as proof. Although, of course, mathematicians would probably tear me apart here for my heresy:sorry, I’m not a mathematician, but an engineer. You can make mistakes by using incorrect assumptions, but at some point, analysis itself will show you that you were mistaken. There’s a wonderful book, How to Prove It by Daniel Velleman, which provides an introduction to proof for the uninitiated like me. I really enjoyed it.

bananaflag12 days ago
As a math prof, I care(d) much more about proof than intuition, not because proof is more important, but exactly because intuition is (I'm a bit Chesterton-ish here haha). You cannot do proof without intuition hence, if you emphasize proof, intuition will take care of itself. Whereas if you emphasize intuition, students won't have any idea of what a rigorous proof should be.
bunderbunder12 days ago
As someone who mostly only applies math, that strikes me as a peculiarly academic take. Intuition is more important for me because it’s what enables me to know what methods are most applicable to whatever practical problem I’m trying to solve. The proof’s purpose is to verify my intuition. It’s just a means to an end. I only take the time to do my own when I can’t confirm what I need from a textbook or paper.
Aerroon11 days ago
>You cannot do proof without intuition hence, if you emphasize proof, intuition will take care of itself.

This isn't always the case. Our algebra (or analysis) course focused a lot on proofs for the exam. The result was that a lot of people learned the proofs by heart.

fidotron12 days ago
Surely this implies these LLM generated proofs require the LLMs to have mathematical intuition . . . and honestly I don't think many people believe that, and rightly so, certainly not in the way Poincaré was on about.

Maybe it's been done, but I'd like to see an LLM recreate Euclid from questioning without having seen it during training.

contubernio12 days ago
As a math professor, I care much more about the key idea, heuristics, and motivation than the proof. With the others in place the proof is clear, something an AI or a student can do.
zmgsabst12 days ago
To agree:

In my experience, proof is the gym reps that allows you to harness strong intuition elsewhere.

In practice as an engineer, intuition is far more useful, eg, being able to “feel” when something is off in our reasoning — but proofs are where I train those same sensibilities on “harder” problems, (eg) details about how to model identity, equality, and equivalence in a formal model.

notarobot12312 days ago
Similarly, programming is also a precise language of communication. Initially, we focused on direct machine behavior but every abstraction above the hardware (including assembly) has been to make that behavior legible to humans.

Developed notations and shared procedural abstractions have made thinking about computation more intentionally human and source control has established a protocol for conversing with other humans in the language of a program and changes to that program.

The moment just now feels like a neglecting of the idea of communication being central. If the program is a compile target but not sufficiently legible or if the conversation moves too quickly for us to keep up then we retain the effects of computation but loose its meaning as communication. We loose the understanding and the ability to develop and evolve further shared abstractions.

Open source programs could be more like motivated explanations of computation. For open source to survive, maybe we should start to make the distinction between free product distribution and programming as communication and community building.

skydhash12 days ago
> Open source programs could be more like motivated explanations of computation.

It is already that. Every time a method/function is created, a structure is defined, a variable is added, a file is created or renamed,… It’s all for the purpose of human communication. The computer only need binary in a single file.

But people feels like they should be able to jumpninto curl code without any understanding of networking, or linux code with no knowlede of computer architecture. Few code are meant for total beginners.

Xirdus11 days ago
Programming was never about communication. It was always about making the machine do the thing we want. Back in the day, a good game programmer knew which time intervals had writable video memory and which CPU cycles drew which scanlines, and spent more time rearranging the code to hit these timings than to write the actual algorithm. Later programmers (I hesitate to call them good) learned everything there is to learn about OS internals and wrote theoretically nonsensical and invalid code that still worked thanks to those internals, to save CPU cycles and especially memory use. And the next generation of programmers took the principles of late binding and abstraction to the logical extreme and created architectures that cannot be described in words anymore, only in diagrams - but are crazy good for code reuse, traceability and A/B testing.
d-us-vb11 days ago
This feels a bit too optimistic regarding programming. Or perhaps betrays an imprecise definition of programming. To me, programming is about expressing algorithms. But algorithms may be totally illegible and still work fine.

Math on the other hand is exclusively about being understood. It is ideas from math that made algorithms legible and thus made the act of programming an act of communication. If by programming you mean using notation and ideas that were borrowed from mathematics to specify algorithms, then for sure it’s communication, but only inasmuch as it was math first. If you mean only specifying algorithms, then no communication need take place; the executor of the algorithm will deterministically execute it irrespective of its ability to communicate.

a-dub11 days ago
> There’s a wonderful book, How to Prove It by Daniel Velleman

the name sounds familiar but i don't think i have read that one, i did enjoy "introduction to mathematical reasoning" by eccles.

personally my relationship with mathematical proofs has been complicated. it took some work to understand basic proofs (dedekind cuts, ideas vs. instructions with mathematical notation), but all of the theory of computation proofs, which supposedly are difficult for many, were completely intuitively easy for me.

i think mathematicians are facing a similar confusion as computer programmers. the medium used to require precise thinking and the simple act of reading, writing and composing it was a mechanism for thinking and learning. in the llm era, the question is: should there be a new mechanism and if so, what should it look like?

Geof2512 days ago
People often hate math because it was not explained to them correctly, usually by people who are good mathematicians but know close to nothing about teaching.

It was so infuriating to see everyone in the class absolutely fail on a specific subject and the "teacher" assumed that everyone must be stupid then. No self reflection, no questioning himself why he is not getting gaussian distribution in marks, just straight Fs.

krisoft12 days ago
> usually by people who are good mathematicians but know close to nothing about teaching.

I higly doubt that. Maybe in university level courses. Most people’s only experience with mathematics is an elementary or high school teacher who were probably themselves at best mediocre at the subject. Simply because of selection factors. Those who are good at math are encouraged to go into STEM. There will be of course exceptions everywhere, but that is not what “usually” happens.

And thats just about being good at maths the school subject, which is distinct from being “ good mathematicians” the science / research topic. Mathematicians are few and far between, simply because it is a specialist subject. There just aren’t enough of them to go around for them to be the formative experience around math for most people.

Paracompact12 days ago
Another response to math that makes me sad: "I must be too stupid to understand this," "my brain is too small for this," etc. Different people say it for different reasons, but it's almost always in response to a hand-wavey explanation that doesn't makes sense to anyone not already in the know. Math is so much more about humility and skepticism than it is prodigy.
zozbot23412 days ago
> People often hate math because it was not explained to them correctly

Spoiler: this is also why mathematicians hate vibe-math. AIs are outright terrible explainers even when they do have a watertight logical argument—and honestly, this is the load-bearing seam.

It goes beyond "proof vs. exposition": the logical derivations AI comes up with fail to even qualify as human-directed proof because of how terrible they are (far below even the most novice mathematician doing their roughest work) at the exposition part.

partyficial12 days ago
a good teacher remembers the journey, not just the destination.

socratic method exists. almost none follows it.

jacquesm10 days ago
'From which it is obvious that...'
sweezyjeezy12 days ago
The math field is confronting something that coders have been dealing with for a few years now, only far more violently. Today's moat for software seems to be that AI can automate tasks but not a full job (yet). But for a large proportion of mathematicians, doing these tasks really was _the_ job. It's the bit they wanted to do, and if they completed a sufficiently difficult set of tasks, they got tenure. Now this model is failing, they frantically need to pivot the role of humans to save their profession from funding cuts.

I remember when "writing code was never the point" became a mantra here. There was truth in it, but removing the coding has certainly taken away a lot of the texture of the work and enjoyment of the craft. Many of us feel this loss as we tech-lead teams of agents as our source of income. I am not optimistic the mathematics pivot is going to work, but I'm certain that most will be depressed with the outcome even if they succeed.

We are all staring at the same existential dread, just seeing it unfold slower. We're being told that utopia is to be obsolete, and that is a jarring idea to contend with.

ipnon12 days ago
I feel that you can see quite strongly the truth in “writing code was never the point” when you encounter inevitably at every company the guy who has been around forever but doesn’t seem to be working particularly hard. Their value is (was) no longer in writing code at a furious pace all day. It was having a coherent, intelligible and communicable theory of the software system the company is founded on.

I propose this thought experiment: put all living mathematicians in a very long bus. This bus crashes and they all tragically lose their lives. Can we really say mathematics simply marches onwards with AI alone? Let’s say Anthropic needs a new research result to improve Claude. Are we really already at the point where we burn tokens ad infinitum and arrive at the end of scientific progress in some timely fashion?

sweezyjeezy11 days ago
I actually have a rather dim view of the "writing code was never the point" line. Not because it's objectively wrong, but because I see it as something we're mostly telling ourselves to feel better about the status quo. Ability to write good code has been highly celebrated (and remunerated) for decades. As it is becoming less relevant, we immediately backtrack and start lionizing the parts where we can still be useful instead. Consider the counterfactual - AI continued to be terrible at writing code, but weirdly better at humans at product decisions, architecture etc. In this universe, saying "coding was never the point" would not be popular.

It also find little solace in it aside from 'well this version of GPT isn't taking your job'. AI labs certainly have no intention for the higher level skills to stay in the human-only domain. The veteran developer with the coherent theory of a large stack is immensely valuable today. But they also don't survive if a company can drop a few coders' salaries on rewriting that stack from scratch - faster, fewer bugs, more coherent, able to react to changing business requirements with more agility etc. I am not saying this is where we are, but I think there is a reasonably good chance this is where our road is leading us.

0c3ca8311 days ago
I'm just waiting for "Humanity was never the point, let our AI children transcend and replace us".

Maybe it's time to reject utopia.

augment_me10 days ago
Isn't it kind of inevitable? As long as humans have the desire for power and control, informational networks will be developed and extended until the point of replacement of humanity because it will be in some parts interest to use them to accumulate power.

You're asking to go against evolutionary principles to reject the utopia. Everyone on earth will never agree to become monks, there will always be the desire to reproduce better, signal status and power, so the technology will be developed until we are finished as a species.

QuesnayJr11 days ago
I've already seen this sentiment expressed in the wild.
adverbly11 days ago
In some sense, I can't think of a worse group for this to happen to, but a better group for who might come up with a solution and help humanity forge a new path.

I've long been of the opinion that mathematicians are probably the smartest and most clever workforce around.

They really might be our best hope to solving this.

I've often secretly wished that some of these clever folks would get their head out of the books and solve some real world problems. This might just be a forcing function for that.

I can't imagine the social disruption of for example it had been trucking or construction or some other industry which might react more combatively and less constructively to complete automation.

youoy12 days ago
Part of the controversy here is that now the skill advantage that some Field Medalist had is much narrower. The fact that fields medals have an age limit implies that it favors brain power over understanding. And that was the guiding light award of the community. So i find it "funny" (and natural) when they are offended by AI. That is the main "crisis" of mathematics.

In my opinion there has never been a better time to be a mathematitian, and there has never been a better time to be a software builder.

But there has never been a worst time to have the need to prove your economic value as a mathematitian or software developer alone. Because "understanding" is not something you can prove in one afternoon, its something that you prove with a life.

sweezyjeezy12 days ago
> In my opinion there has never been a better time to be a mathemetician...

As an ex-mathematician I assure you this is very wrong, and every working mathematician I know right now is completely miserable, and/or trying to flee the field as fast as possible. It's like telling a chair-maker during the industrial revolution that there had never been a better time for them, since now they could operate chair-making machines instead of toiling away at the wood themselves. It assumes that they were purely in it for their passion for mass-producing chairs. The majority of mathematicians get into the field because they love problem solving, and the gauntlet thrown down by challenging math tasks.

Many parts of this will never be useful for society on a grander scale - but this is reflected in the finances - pure math is closer in funding-terms to a humanity than to hard science. Now even this is _massively_ under threat, and Tao and co need to pivot quickly to stop this from becoming a bloodbath.

youoy12 days ago
Im an ex mathematitian too. And if i was in academia I would probably have the same reaction. Thats what i say that its the worst time for proving economic value.

But if you are in for theory building and understanding, then you are not constrained anymore by your motivation to grind through countless hours of formal theorem proving. And you do not need to have superhuman formal manipulation skills and memory.

For me mathematics is not the formal system, so LLMs will never be able to do end to end maths.

calf12 days ago
But these are not very good arguments, because it makes it about the fall of institutions (the funding) and people being miserable for personal reasons rather than prosocial reasons. Tao here clearly suggests that math is not reducible to "problem solving" or "proofs", the valuable part is much more than that framing.

The concerning argument about the status of math would be an outline that it will get destroyed by a process of societal atrophy and there is no turning back, and the AI powers are not a good substitute or replacement for it. If an entire society becomes reliant on these oracle machines then it would be analogous to children never learning arithmetic because they were handed calculators. How could the human race still flourish? We would anthropologically regress. We'd be little better than animals, like the Borg zombies.

That is a much more profound threat than people worrying about their own careers or faculties disappearing like the humanities. This is a serious anthropological reckoning.

If math experts are that freaked out already then basically all of science is soon to follow, decade by decade. "Singularity" comes to mind.

trostaft11 days ago
> As an ex-mathematician I assure you this is very wrong, and every working mathematician I know right now is completely miserable, and/or trying to flee the field as fast as possible.

To throw a counterpoint to this into the writhing cesspit of HN, I'm active in academic mathematics (postdoc) and every one of my collaborators is deeply in love with the field and their jobs. Perhaps the grass is greener on the applied mathematics side of the fence.

soVeryTired12 days ago
Probably true for the dedicated problem solvers (of which Tao is one IMO). But I doubt there's ever been a better time to be a theory builder (more like Peter Scholze, or Grothendieck).

Some up with an idea and leave the system to check it 15 different ways, and see whether you can simplify an existing body of theory. It'd be like having an army of lightning-fast grad students.

ceh12312 days ago
> In my opinion there has never been a better time to be a mathematitian

I think it’s a great time to be a curious mathematician, especially in a niche field where you’re not competing with hundreds of agents of the best unreleased frontier models.

However it’s a very scary time to be a professional mathematician because publish or perish is going to cause a race to the bottom for cranking out results as fast as AI can let you. [0]

[0] https://ev12183725.substack.com/p/a-highly-productive-dark-a...

elendilm12 days ago
Spot on. I agree. There has never been a better time to be a software builder or a mathematician.

Seekers whose primary motive is validation instead of understanding are the ones who are getting paranoid.

Thoroughly enjoyed your thoughts. The age limit is a joke if what you care about is true understanding.

contubernio12 days ago
I'm a professional mathematician. Today I proved what for me is a very solid theorem. It's something I had thought about for a few years. With a few weeks of serious use of AI I've found a proof that I am currently trying to write up, but which appears correct. The change in the workflow is enormous, but so is what one can do if one has clear what to do and how to do it.
visarga11 days ago
Not every problem will receive $20M in funding to be solved by AI; for the rest, good human guidance will have to suffice. Labs only pulled this stunt because they wanted to show investors how powerful their models are on their own. But look again at the cost of that army of 10,000 SOTA agents. At the very least, I foresee a need for humans to decide when costly AI resources should be committed to a specific search plan. Grant review remains irreducibly human because it involves choosing which directions to fund and weighing opportunity costs: taking one path forecloses others.
getnormality12 days ago
Congratulations. You are one of those leading the way, showing how we will adapt and how the world will get better from AI.
contubernio12 days ago
That's not the conclusion. I started using AI after the Jacobian conjecture counterexample and have used a particular problem to learn how to use AI and to explore it's capabilities. I'm not a great mathematician but I'm full faculty with 25+ years of research experience and lots of articles and I just proved in a few weeks something that had resisted my efforts for some years.

The exploration process is much easier now. Ideas are quickly testable and multiple tests can help identify a technical obstruction. The tool requires good guidance and input but as it trains on people like me it will need those less.

At the very least our way of doing things must change. More pessimistic views seem to me defensible.

daxfohl11 days ago
I find myself less worried about it than at first. I think what we'll see are that some things are low-hanging fruit and can be solved just by tireless search. Maybe half the millennium and other such high-visibility problems will fall this way.

Others, I think, will be beyond both human and AI. And so what then? Mathematicians just throw in the towel and say it's not worth trying? Of course not. We will continue that pursuit, and as we do, new ideas will arise and new problems will need to be solved. It's math. There is no end.

It's easy to look at the current landscape and see AI ticking off solutions to problems and imagine that soon there will be nothing left. Machines replaced the need for much manual labor, but they also established a basis for an economy that provides the opportunity for more labor. This is the situation with math now. It will take some getting used to. There will be little-to-none pencil-to-paper working out of problems anymore, but there will always be work to do, things to solve, curiosities to unravel. And it will still be professional mathematicians who are the ones most capable of directing that effort. Because, if nothing else, they're the ones whose curiosity is piqued by the problems. Which, let's face it, has been 99% of the motivation for graduate-level math in the first place.

There's the the old question: is math invented or discovered? I think it's both: the problems are invented, and the solutions are discovered. In the age of AI, the discovery part will be greatly affected, but the invention part will remain firmly in the human domain.

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