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ComplexSystems

1,296 karma · joined July 3, 2015

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ComplexSystems··on Removing the modem and GPS from my 2024 RAV4 hybrid
Sure, you can substantially reduce the information collected about you as long as you don't just give it away somewhere else instead.
ComplexSystems··on Removing the modem and GPS from my 2024 RAV4 hybrid
The reason I think this is a bad idea is that it lulls you into a false sense of security. The article makes recommendations that seem thorough and sensible - keyword "seem" - but, as mentioned elsewhere here, there are other potential hidden sources of telemetry (in CarPlay and Android Auto), and who knows what else.

For this kind of thing to succeed as a general lifestyle, you would need to invest an enormous amount of time making potentially irreversible modifications to all kinds of electronic equipment - only to be virtually guaranteed to miss something.

Do this kind of thing if you want, but don't be fooled into thinking you're actually solving the problem for real.

ComplexSystems··on Princeton mandates proctoring for in-person exams, upending 133 year precedent
You know, back when it was a noble democracy where all men were free, or something.
ComplexSystems··on Parents say ChatGPT got their son killed with bad advice on party drugs
Surely there's room for the view that this is misaligned behavior for ChatGPT to have. I would guess this is during the "sycophantic" phase last year.
ComplexSystems··on GitLab announces workforce reduction and end of their CREDIT values
Yet another round of layoffs. Is there a fallback career? :-/
ComplexSystems··on A polynomial autoencoder beats PCA on transformer embeddings
That makes sense. If you could magically just get the top d PCs in quadratic kernel space without having to compute the whole kernel matrix, and then just do top-d quadratic PCs -> ridge, would that be better than doing the PCA -> top-d -> quadratic kernel ridge as you are now?
ComplexSystems··on A recent experience with ChatGPT 5.5 Pro
Absolutely. Who cares if the LLM automates some of the grunt work? Mathematicians are artists, and they paint with ideas. The goal is map out more of the beautiful structure of how things work. The enjoyment in it derives entirely from the payoff of seeing the larger view of how things fit together. If part of their process involves bouncing things off of other people, or even LLMs, I don't think it matters much, nor does it take away from the enjoyment in getting things figured out.
ComplexSystems··on A polynomial autoencoder beats PCA on transformer embeddings
What makes this different from just kernel PCA with the quadratic kernel?
ComplexSystems··on US Government releases first batch of UAP documents and videos
People can and do see unidentified things and take plenty of photos of them.
ComplexSystems··on Maybe you shouldn't install new software for a bit
While I am sure FreeBSD is more secure than your average Linux distro, I sure hope they are using these new AI models to harden everything.
ComplexSystems··on Softmax, can you derive the Jacobian? And should you care?
Good article, but

"We take the exponential of each input and normalize by the sum of all exponentials. This transforms a vector of arbitrary real numbers into values between 0 and 1 that sum to 1, it technically this is a pseudo-probability distribution (they're not derived from a probability space), but it's close enough to a probability distribution and for practical purposes they work just fine."

Why is this a "pseudo-probability distribution?"

ComplexSystems··on GPT-5.5
It seems like some kind of technique is needed that maximizes information transfer between huge LLM generated codebases and a human trying to make sense of them. Something beyond just deep diving into the codebase with no documentation.
ComplexSystems··on Not all elementary functions can be expressed with exp-minus-log
Yes it does; you can build the absolute value as sqrt(x²), and sqrt(x) and x² are both constructible using eml.
ComplexSystems··on Project Glasswing: Securing critical software for the AI era
This line of reasoning makes no sense when the AI can just be given access to a fuzzer. I would guess that it probably did have access to a fuzzer to put together some of these vulnerabilities.
ComplexSystems··on Embracing Bayesian methods in clinical trials
> So the data cannot possibly tell you anything about how likely is the observed outcome, because the observed outcome is the only outcome that you observe.

This could also be viewed as supporting the Bayesian perspective, where the observed data are not viewed as random variables - they are fixed. This is because, as you say, the observed outcome is the only outcome that you observe. It is the classical setting, in comparison, where we instead do our analysis by treating the sample as a random variable, placing the counterfactual on other non-observed values ("what if I had drawn a different sample?"), even though we didn't. Bayesian methods treat the data as gospel truth, and place the counterfactual on the different parameters ("what if the population were different?"), even though it isn't.

The other criticism you have is

> The problem with this approach is that we can only observe ONE level of treatment effectiveness, i.e., the level of treatment effectiveness that the treatment actually possesses. All other possible levels of effectiveness are entirely hypothetical.

This is true of both Bayesian and classical methods. We build models that would explain how different hypothetical levels of effectiveness would affect what data we should expect to see - that is the whole point. Classical methods also involve exploring scenarios in which purely hypothetical values of the parameter may be potentially true, and characterizing counterfactual samples that could have been drawn from them, even though in real life they couldn't have been.

ComplexSystems··on Embracing Bayesian methods in clinical trials
I found it surprising that this article persistently did not capitalize the word "Bayesian." Is this a new trend or something?
ComplexSystems··on Woxi: Wolfram Mathematica Reimplementation in Rust
I certainly don't. If a software developer has found a way to use these tools that works well for them and produces good results, that's a good thing.
ComplexSystems··on Anthropic gives Opus 3 exit interview, "retirement" blog
They are mathematical models of what human beings would say. That's it.
ComplexSystems··on Ggml.ai joins Hugging Face to ensure the long-term progress of Local AI
> the code is not public, so we can't know.

I feel like you're making this statement in bad faith, rather than honestly believing the developers of the forum software here have built in a clause to pin simonw's comments to the top.

ComplexSystems··on Claude Opus 4.6
Do you ever replace ChatGPT models with cheaper, distilled, quantized, etc ones to save cost?
ComplexSystems··on Claude Code's new hidden feature: Swarms
How much does this setup cost? I don't think a regular Claude Max subscription makes this possible.
ComplexSystems··on Erdos 281 solved with ChatGPT 5.2 Pro
The model doesn't know what its training data is, nor does it know what sequences of tokens appeared verbatim in there, so this kind of thing doesn't work.
ComplexSystems··on AI generated music barred from Bandcamp
It's really only about the flooding the marketplace part, not about the extracting volume without their consent part. The current set of GenAI music models may involve training a black box model on a huge data set of scraped music, but would the net effect on artists' economic situations be any different if an alternate method led to the same result? Suppose some huge AI corporation hired a bunch of musicians, music theory Ph. D's, Grammy winning engineers, signal processing gurus, whatever, and hand-built a totally explainable model, from first principles, that required no external training data. So now they can crowd artists out of the marketplace that way instead. I don't think it would be much better.
ComplexSystems··on “Erdos problem #728 was solved more or less autonomously by AI”
If this isn't AGI, what is? It seems unavoidable that an AI which can prove complex mathematical theorems would lead to something like AGI very quickly.
ComplexSystems··on AI coding assistants are getting worse?
Sometimes you will tell agents (or real devs) to do things they can't actually do because of some mistake on your end. Having it silently change things and cover the problem up is probably not the best way to handle that situation.
ComplexSystems··on AI coding assistants are getting worse?
I don't think this is odd at all. This situation will arise literally hundreds of times when coding some project. You absolutely want the agent - or any dev, whether real or AI - to recognize these situations and let you know when interfaces or data formats aren't what you expect them to be. You don't want them to just silently make something up without explaining somewhere that there's an issue with the file they are trying to parse.
ComplexSystems··on The unreasonable effectiveness of the Fourier transform
Signals can be approximately frequency and time bandlimited, though, meaning the set of values such that the absolute value exceeds any epsilon is compact in both domains. A Gaussian function is one example.
ComplexSystems··on Eat Real Food
"Isn't that basically what we've been doing with dietary guidelines since the 80s?"

If by this you mean to ask if the new guidelines are the same as previous ones from the 80s, then no. The new pyramid is different, makes different recommendations (more meat, for instance, and less wheat and grains). The website linked to explicitly shows how it is different from the previous "food pyramid" guidelines.

ComplexSystems··on Mamdani Will Be Sworn in at Abandoned Subway Station Beneath City Hall
https://archive.is/20251230100610/https://www.nytimes.com/20...
ComplexSystems··on How Lewis Carroll computed determinants (2023)
Suppose you have (let's say) a 3x3 matrix. This is a linear transformation that maps real vectors to real vectors. Now let's say you have a cube as input with volume 1, and you send it into this transformation. The absolute value of the determinant of the matrix tells you what volume the transformed cube will be. The sign tells you if there is a parity reversal or not.
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