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The most important tool in Probability and Statistics - Markov Chain Monte Carlo (MCMC) Method Fresh out of undergraduate Probability and Stats courses, it’s easy to feel invincible. You’ve tamed Gaussians, gammas, betas, all those neat closed-form toy distributions. Then research hits and you meet the harsher truth. Real...

32,296 次观看 • 5 个月前 •via X (Twitter)

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I asked Garry Tan how to use meta prompting to get better at AI: "My partners at YC Jared Friedman and Pete Koomen showed me how to do this. You can take almost anything that you do all the time and just drop it into a context window. And then say, “Here’s a bunch of inputs and outputs." And maybe you also add a bunch of notes. And then you tell it, “Write me a prompt that can act as an agent that takes this input and makes this output over here.” You can do this for almost any type of knowledge work. And you can even introspect. "What are things you notice that I did to convert this from the input to the output?”. And then you can just start using the prompt. Initially, it’s going to suck. Because it’s just not that smart yet. But what’s funny is now, I also use it to Iterate my writing. You can be very direct, "I would never say that", "Don’t say it like this", or "Oh, you used the long word there, use the short word". Just speak to it conversationally. And then when you're happy with the output, you can use that new output to make a new prompt. "Based on this conversation, give me a better initial prompt that incorporates all the things we talked about." And you can do this with literally everything. And in theory, there’s so much it applies to that people do day-to-day. You could use it for tweets. You could use it for editing podcasts. You can use it for pretty much everything. I have a folder of prompts that I use all the time. My YouTube prompt is on v27 or something. I'll go through this process with all the different max models. I'll use GPT 5.2 Pro. I’ll use Grok. I'll use Claude. Then, I’ll take all the outputs from all the models and put them into Claude and say "Here’s my prompt, here’s the output from four LLMs, including yourself. Rate each response and tell me what the pros and cons of each approach are." And I usually say "give it to me in numbered form". And then you can agree with one, disagree with two, tell it three is this or that. And then after that, you say given all of this, synthesize it."

The Peel

51,632 次观看 • 5 个月前

Naval Ravikant’s checklist for starting a company “The most important thing is there are no formulas. At the end of the day, you have to do what you love, and you have to do it even though people tell you it’ll never work. But that being said, if there was a formula [for starting a company], I would put it something like this.” Naval started seven companies before AngelList and this is the checklist he recommends running through before starting a startup: 1. Pick a great cofounder. This is most important: “You can do a company on your own, but it’s like you can raise a child on your own, but you probably shouldn’t. You need someone who’s going to be there with you.” This has it’s own checklist. Your cofounder should be: a. Very high intelligence (”hopefully they make you feel dumb, or they’re not smart enough”) b. Very high energy (”They should be extremely hardworking. A founder is someone who never has to be motivated. You should not have to be telling them to do their job.”) c. Very high integrity. (”a smart, hardworking crook who’s going to cheat you is the worst kind of person to be paired up with.”) 2. Pick a very large market. “Notice I don’t talk about the idea. I think ideas are almost irrelevant… The more important thing is that you pick a large space that you’re knowledgeable and passionate about. And then you will figure out what the right thing to do within that space is.” You want to be able to say to investors: “This is a space where there’s a huge market. I’m really knowledgeable and passionate about it. Here’s the great person that I have doing it with me. And here’s the minimum viable product that we have built. That will show that we can test in the marketplace… You iterate until you get to product/market fit… And then you go and you raise money from people you trust. And you use that money to scale.”

Startup Archive

36,050 次观看 • 1 年前

Vitalik Buterin on why consortium blockchains have mostly failed “The original vision of consortium blockchains — the idea that you have 5 banks or major companies that come together and create their own chain — has been mostly a failure. I think the reason why is it ends up inheriting most of the disadvantages of centralization and most of the disadvantages of decentralization at the same time.” “The first five banks join, and they all feel like ‘Yay, we’re building a system together. We can all be part of it.’ But then once bank #6 and bank #7 and bank #29 come in, they’re joining a system where there’s already an established power structure, established participants, and basically to them it still feels like they’re joining some kind of centralized thing that’s controlled by a cartel.” “You don’t actually gain the benefits of true openness that people are looking for. You don’t have Etherscan. You don’t have a connection to an open, public network. At the same time, if you build on one of those systems, you have to figure out how to program distributed systems; you lose privacy — you might think you still have some, but the reality is you’re putting your data on a network where the only people that get to see it are you and all your closest competitors. From a privacy perspective, it actually doesn’t make much sense.” “The compromise between centralization and decentralization that actually makes a lot more sense is: you have an application and today that application is a server. You can keep your server, but instead, we’re going to add scaffolding on top to give users extra security guarantees. You put Merkle roots on chain. You put proofs on chain. And you give your users assurance that whatever is happening inside of your system is actually following the rules. So you have high scale, high performance, and you optimize for a minimal delta for existing centralized infrastructure deployment. Keep your existing infrastructure the way it is, and you just add a side car that makes the roots and the proofs.” Source: Arbitrum

Etherealize

131,342 次观看 • 2 个月前

Why did so many languages copy async/await from C#? Anders Hejlsberg(Anders Hejlsberg) - creator of TypeScript, C# & Turbo Pascal - on what they got right with the design: #1 - async/await was designed to solve a common problem in the event-loop model: "A lot of languages are built around cooperative multitasking in the sense that they have an event loop that sits and dispatches events. Then you handle the event and then you yield back to the event handler loop. And it all runs in a single thread cooperatively. The problem with that is if you then want to do some long running work: how do I stop in the middle of this piece of long running work and yield back to the event loop cooperatively? And then when my result is ready, I can come back and continue executing here." #2 - state machines are the solution, but hard to build: "Well, in order to do that in an inverted architecture like that, you have to build a state machine. State machines are notoriously hard for people to implement because you've got to move all of your state off of the stack into objects. And then you have this big case statement that envelopes your entire logic. It's a nightmare to figure out. But, the transformation from serially executing code into a state machine, its continuation-passing-style translation is actually one that you can do in a machine-based fashion." #3 - compilers are good at writing state machines: "You can have the compiler write the state machine if you introduce syntax that allows you to indicate where you want to yield. And that's what await is. Await is basically saying, I want to yield here, and I want to yield this promise, and then when the promise completes, I want you to come back here and continue executing. Then the compiler writes a state machine around it and it actually turns it into this big switch statement and moves all of the state that survives across the await into something that's heap allocated. So it can be brought back. And doing all of that work is something that compilers are great at. And so that was sort of the idea that we have this new style of programming where we're using promises or the equivalent of promises and the ability to yield and then we have callbacks. But trying to write your program in that style, that's also what JavaScript suffered from a lot. It's like all this callback style stuff. With Async and Await, you get the illusion that you're just writing normal sequential code and then the compiler does the painful transformation for you. That turns out to be really useful."

The Pragmatic Engineer

13,258 次观看 • 1 个月前

This is one way they're going to fill those ICE warehouses IMO: "With PCR [they] can declare you a carrier of any possible virus...[and] certain viruses are... written into law as quarantineable.... [So they can] violate your constitutional rights and imprison you without due cause." This clip of retired pharma R&D executive Sasha Latypova (sashalatypova.substack.com "Due Diligence and Art") is taken from an interview with Shannon Joy (Shannon Joy) posted to Rumble on February 10, 2026. ----------------Partial transcription of clip--------------- "With PCR, we can declare you a carrier of any possible virus. Any possible virus on the planet existing now, imaginary, non-imaginary, the one we just drew in a cartoon. We can diagnose you with that virus with the PCR, and then depends on how. "And also the US law is set out such a way that certain viruses are actually written into law as quarantineable. And quarantineable means the government can violate your constitutional rights and imprison you without due cause. And this is why they build those centers in the marketplace mall, by the way. "So this, the detention center. There are several viruses, including influenza and Covid and a few others that are written into the US Law that gives CDC and the military unlimited power to. To detain you, take you off a cruise ship like, just like they did with those, Grand Princes and, the other. Yeah, International Princess. I forget those two. And, send you to the military base where you will be treated against your will and killed there and then declared you dead from COVID or disease acts or whatever next virus we're going to have on the menu. "And so that's why. That's why these, these are, you know, these are not just to harvest people's bodies. That's. That's a given. Yeah, they've been doing that, that for ages. Now this is also designed to imprison anyone by declaring them a carrier of a, of an emergency threat virus. And so imprison any dissident, anybody the state wants to get rid of is a perfectly easy way to do... And also broadly establish control measures. "So if they want to roll out CBDC programmable money, this is a way to do it, by tying it to your health records. They already tying everything to the. To the health records. They're already centrally collecting all the health data through the electronic medical records, which. Which, you know, technically the practice of medicine, including these electronic medical records, supposed to be a purview of the state regulation, not federal regulation. But... we have blown past that a long time ago. "And now all these records, health records, have been centrally sucked into federal databases, which are then turned over to Palantir to target you, to the sum up, to AI, to set up some AI to surveil you. So now they can force you, especially with people with children, they can threaten them, and you've been participating in those, in those cases many times where they can threaten the parent if they deny some sort of a health intervention. "And, you know, and parents will comply just because they're afraid for their children. But guess what? They can also test your child for some novel virus. Find it, and then you. And then you become it. Then you become the sentinel case. Then you become that case that they need to demonstrate there is a pandemic... Lock down the whole community, do whatever they wish there. It becomes an unlimited scenario for totalitarian dystopia."

Sense Receptor

14,513 次观看 • 5 个月前

I was watching a lecture on YouTube by David Tse from Stanford (see link below), and he quoted his advisor Bob Gallager: "Good theory should prune rather than grow the knowledge tree." To demonstrate what Gallager meant, we takes one idea… "how do you move mass from one shape to another as cheaply as possible?" and watch 200 years of mathematics cut that idea down to its clean geometric core. Monge (1781, "Mémoire sur la théorie des déblais et des remblais") A mound on the left, a trench on the right, and every grain of earth has to choose one destination and stick to it. In the animation that’s strict one-to-one matching: each point marches to a single partner, no splitting, no sharing. It’s beautiful but rigid and hard to work with. Kantorovich (1942, "On the Translocation of Masses"; 1948, "On a Problem of Monge") Kantorovich relaxes the rules. Instead of forcing each point to pick exactly one target, he allows mass to split: part of it can go here, part of it can go there. On screen you see packets of mass spraying from one source cell to several targets along smooth arcs. The problem becomes a clean convex optimisation problem. Brenier (1991, "Polar factorization and monotone rearrangement of vector-valued functions"); McCann (1995, "Existence and uniqueness of monotone measure-preserving maps"; 1997, "A convexity principle for interacting gases") Bernier then shows that, in the most natural cost setting, the best way to move mass always comes from a hidden height function whose slopes tell you where to send things. McCann shows that many natural energy functionals behave nicely along the paths generated this way. In the animation you see contour lines of that hidden landscape, with particles gliding along the most economical path between the two shapes. Jordan-Kinderlehrer-Otto (1998, "The variational formulation of the Fokker-Planck equation") JKO change the question from "what is the best single shuffle?" to "how does a whole cloud evolve in time?". They show that a familiar diffusion-with-drift equation can be reinterpreted as steepest descent of a free energy in the space of probability distributions. In the scene, a blob both smooths out and gets pulled toward the embankment while a free-energy counter steadily drops. Ambrosio-Gagli-Savaré (2005, "Gradient flows in metric spaces and in the spaces of probability measures") Ambrosio-Gigli-Savaré take that idea and generalise it far beyond this one setting. They build a theory of gradient flows on abstract metric spaces: you only need a notion of distance and an energy, and you can talk about curves of maximal slope. Wasserstein spaces become one important example among many. In the final scene the probability field evolves in the top panel while its energy traces a clean descending curve below.

Mathelirium

65,705 次观看 • 7 个月前

.Naval: Epistemology, which is a fancy word for the theory of how knowledge grows or how knowledge growth occurs. And we've all been told since we're young that there's a scientific method and that scientists sort of do this stuff in white lab coats and we're supposed to accept it because of this thing called the scientific method. And then they give us true beliefs that we can then say, well the science is settled and we take that we move on. And we all only have a very, very vague understanding of how this works. And people say, well maybe you go out in the real world, you look at what's happening, you make all these observations, and then based on that you form a theory, you test the theory against more observations, and the more observations you get the closer you get to the truth. And once you have enough observation it's true and then you call it a scientific theory or a law and it's settled and you move on. And this is the popular conception of how science works. And as Popper pointed out and as you take even further, this is completely wrong. And so I'd love for you to get into that, which is what is knowledge? How does it grow? What is the real scientific method? And how do we figure things out? David Deutsch: I love the way you just stated the prevailing view there and laced every aspect of it with the contempt that it deserves. So you just went through touching every base. It's amazing that this series of misconceptions is still common sense. I mean, that it was common sense at a time when we didn't really have science or when science was just starting up, when the main issue in science was freeing itself from dogmatism, freeing itself from religion, freeing itself from authority, and so on. There it was understandable that people would look for an alternative source of authority and they would think, oh, it's sense impressions. We can see the world and you know, these religious people, they can't even see God and so on. And so we are confined to what we can see. That's where we get our ideas from. And as you say, that is completely false. Sense impressions, like all observation, even the most careful scientific observation is all theory laden. And theories are inherently fallible. I mean, we actually want to replace our best theories. Everybody who does a PhD is technically anyway, working to overturn something in the existing body of knowledge. You're not turned away at the door if you say, I don't believe this stuff, I'm going to produce something better. Whereas for most of human history, that was exactly what you were forbidden to do. The idea was that we already had all the important knowledge. If you want to discover something new, what you had to make sure of was that it didn't contradict the existing knowledge. Now, you have to make sure that it does contradict existing knowledge. So more or less. Naval: Yeah, it's this tradition of criticism that you've talked about in the West, that the Enlightenment really ushered in the Enlightenment era. David Deutsch: It has been institutionalized. So in many ways, our institutions are wiser than we are. So the institutions of science, for instance, have this built in, even if scientists actually don't always act that way. In fact, they often don't act that way, and act in a dogmatic way and try to preserve the status quo and are resistant to new ideas and so on. But the institutions, the way the procedures of science work, makes the right thing happen in the end anyway, regardless of what the people are trying to do. Naval: So you're saying the knowledge of the true scientific method is embedded in the institutions of science in the PhD process? David Deutsch: Well, the best scientific method that we know of, and one shouldn't really think of it as a method, you know, there's this wonderful lecture by Popper when he first was made a professor at the London School of Economics. He was made a professor of scientific method, and his first six lectures, I wish the rest of them were, the first six lectures are on the internet somewhere. And he starts the first one by saying, I am the first professor of scientific method in the British Empire. The British Empire still existed at the time, more or less. And so the first thing I want to say to you is that there is no such thing as the scientific method. And then he goes on from there. So this subject does not exist. So if any of you have come here to learn the handle that you have to turn in order to make scientific knowledge come out the other end, you're going to be disappointed.

Deutsch Explains

114,992 次观看 • 1 年前