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IIT Madras professor S. Lakshmi Bala walks a full quantum mechanics class through the two-level atom, and she does it for free. Western physics departments charge over $2,000 per credit for a graduate course in quantum mechanics. This entire course has been free since the early 2000s, but someone...

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Trixi

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571,877 次观看 • 3 天前 •via X (Twitter)

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An IIT Madras physics professor teaches a full graduate level quantum mechanics course for free, and almost nobody outside India has heard of it. It's part of something called NPTEL, a government backed program that now hosts over 3,200 free university courses taught by professors at IIT and IISc, India's top engineering and science schools. Dr. S. Lakshmi Bala's course, Quantum Mechanics I, runs through the same material a physics graduate student would sit through in a paid semester: postulates of quantum mechanics, angular momentum, quantum optics, all of it filmed lecture hall style and uploaded for anyone to watch. No login wall, no certificate fee required to just watch, no tuition. Just a professor, a blackboard, and a camera that's been running since the early 2000s. Western universities charge thousands per credit for exactly this kind of course. India just recorded it and gave it away. Is this the biggest free education archive nobody talks about, or are people just not looking?
49:00

An IIT Madras physics professor teaches a full graduate level quantum mechanics course for free, and almost nobody outside India has heard of it. It's part of something called NPTEL, a government backed program that now hosts over 3,200 free university courses taught by professors at IIT and IISc, India's top engineering and science schools. Dr. S. Lakshmi Bala's course, Quantum Mechanics I, runs through the same material a physics graduate student would sit through in a paid semester: postulates of quantum mechanics, angular momentum, quantum optics, all of it filmed lecture hall style and uploaded for anyone to watch. No login wall, no certificate fee required to just watch, no tuition. Just a professor, a blackboard, and a camera that's been running since the early 2000s. Western universities charge thousands per credit for exactly this kind of course. India just recorded it and gave it away. Is this the biggest free education archive nobody talks about, or are people just not looking?

Trixi

551,444 次观看 • 5 天前

🔱Professor S. Lakshmi Bala of IIT Madras has published a free course on quantum mechanics, studying the three-level atom. MIT charges $80,000 to sit in a room and learn this. She didn't ask for a dollar. IIT Madras has a sub-1% acceptance rate. The students in that lecture hall competed harder to get in than most Ivy League applicants. You can watch the same lectures without applying anywhere. The course covers linear vector spaces, quantum state formalism, and the three-level atom - the math behind lasers, MRI machines, and quantum computers. Not a simplified intro. The real thing, from first principles. NPTEL built this. 7 Indian Institutes of Technology and IISc pooled their top professors and filmed the actual university curriculum. Thousands of courses. All free. Almost no one outside India knows it exists. Physics departments in the US have known for years that this content is available at no cost. They keep charging $80,000 anyway. 🔖Watch and save it before someone decides free access to elite education is a threat to the business model.
49:53

🔱Professor S. Lakshmi Bala of IIT Madras has published a free course on quantum mechanics, studying the three-level atom. MIT charges $80,000 to sit in a room and learn this. She didn't ask for a dollar. IIT Madras has a sub-1% acceptance rate. The students in that lecture hall competed harder to get in than most Ivy League applicants. You can watch the same lectures without applying anywhere. The course covers linear vector spaces, quantum state formalism, and the three-level atom - the math behind lasers, MRI machines, and quantum computers. Not a simplified intro. The real thing, from first principles. NPTEL built this. 7 Indian Institutes of Technology and IISc pooled their top professors and filmed the actual university curriculum. Thousands of courses. All free. Almost no one outside India knows it exists. Physics departments in the US have known for years that this content is available at no cost. They keep charging $80,000 anyway. 🔖Watch and save it before someone decides free access to elite education is a threat to the business model.

Trixi

25,741 次观看 • 3 天前

There's a physics lecture with over a million views' worth of value and almost no views. No slides. No notes. Just a green chalkboard and a man who clearly doesn't need one. The professor is V. Balakrishnan, IIT Madras. The course is Classical Physics, recorded for NPTEL — India's free national lecture archive — and quietly sitting on YouTube since 2009. What makes lecture one worth your time isn't production value. It's the opposite. It's a full subject held in one person's head, delivered in order, with nothing between him and the material. He opens with the actual boundary of the field: what classical mechanics can explain, and the precise point where it hands off to quantum theory. No hedging, no filler — every sentence finished before the next one starts. A friend who works in physics told me he went through the entire series and ranks it above courses he paid thousands of dollars for. It's been online for 17 years. Low resolution, zero marketing, still one of the best physics courses on the internet. Sometimes the best teaching in the world was never behind a paywall — it just wasn't in English-language algorithms' way of finding it.
48:48

There's a physics lecture with over a million views' worth of value and almost no views. No slides. No notes. Just a green chalkboard and a man who clearly doesn't need one. The professor is V. Balakrishnan, IIT Madras. The course is Classical Physics, recorded for NPTEL — India's free national lecture archive — and quietly sitting on YouTube since 2009. What makes lecture one worth your time isn't production value. It's the opposite. It's a full subject held in one person's head, delivered in order, with nothing between him and the material. He opens with the actual boundary of the field: what classical mechanics can explain, and the precise point where it hands off to quantum theory. No hedging, no filler — every sentence finished before the next one starts. A friend who works in physics told me he went through the entire series and ranks it above courses he paid thousands of dollars for. It's been online for 17 years. Low resolution, zero marketing, still one of the best physics courses on the internet. Sometimes the best teaching in the world was never behind a paywall — it just wasn't in English-language algorithms' way of finding it.

Nainsi Dwivedi

12,346 次观看 • 1 个月前

An Indian institute filmed a professor teaching classical physics with no notes, no slides, and a green board. Almost nobody outside India watches it. This is Classical Physics, lecture 1, taught by V. Balakrishnan at IIT Madras, published free by NPTEL, India's national open courseware programme. Balakrishnan taught at IIT Madras for decades. Students who sat in that room describe the same thing: the whole subject held in his head, delivered in order, no paper on the podium. Lecture 1 is the introduction. What classical mechanics claims, where the claims hold, and the exact points where they stop holding and quantum takes over. Watch how he speaks. Complete sentences, no filler, each idea finished before the next begins. Rare in any lecture hall on any continent. A physicist I know worked through the whole NPTEL series and rates it above the western courses he paid for. Free on YouTube, 17 years online, low resolution, no marketing. The teaching was never concentrated in the famous universities.
48:48

An Indian institute filmed a professor teaching classical physics with no notes, no slides, and a green board. Almost nobody outside India watches it. This is Classical Physics, lecture 1, taught by V. Balakrishnan at IIT Madras, published free by NPTEL, India's national open courseware programme. Balakrishnan taught at IIT Madras for decades. Students who sat in that room describe the same thing: the whole subject held in his head, delivered in order, no paper on the podium. Lecture 1 is the introduction. What classical mechanics claims, where the claims hold, and the exact points where they stop holding and quantum takes over. Watch how he speaks. Complete sentences, no filler, each idea finished before the next begins. Rare in any lecture hall on any continent. A physicist I know worked through the whole NPTEL series and rates it above the western courses he paid for. Free on YouTube, 17 years online, low resolution, no marketing. The teaching was never concentrated in the famous universities.

xanax

3,265,927 次观看 • 1 个月前

MIT put its full quantum physics course online for free and the opening lecture starts with a box you can't look inside. Almost nobody finishes it. This is 8.04, Quantum Physics I, taught by Allan Adams on the MIT campus. Same room, same problem sets, same professor the tuition pays for. He skips the history and the philosophy. He builds a simple apparatus, sends things through it, and shows the result no classical picture can survive. Skip the first 10 minutes, that part is course admin. What follows is thought experiment stacked on thought experiment until superposition stops being a word and becomes the only explanation left. Every engineer arguing about quantum computing in 2026 is arguing about what happens in this hour. A systems engineer I know watched it twice with a notebook and called it the clearest teaching he'd seen since university. MIT charges $60,000 a year. This lecture costs nothing. The gate was never locked. Almost nobody walks through.
1:15:32

MIT put its full quantum physics course online for free and the opening lecture starts with a box you can't look inside. Almost nobody finishes it. This is 8.04, Quantum Physics I, taught by Allan Adams on the MIT campus. Same room, same problem sets, same professor the tuition pays for. He skips the history and the philosophy. He builds a simple apparatus, sends things through it, and shows the result no classical picture can survive. Skip the first 10 minutes, that part is course admin. What follows is thought experiment stacked on thought experiment until superposition stops being a word and becomes the only explanation left. Every engineer arguing about quantum computing in 2026 is arguing about what happens in this hour. A systems engineer I know watched it twice with a notebook and called it the clearest teaching he'd seen since university. MIT charges $60,000 a year. This lecture costs nothing. The gate was never locked. Almost nobody walks through.

xanax

14,337 次观看 • 1 个月前

MIT filmed a full graduate-level quantum mechanics course and put every lecture online for free. The instructor is Allan Adams. He stands in front of a chalkboard in a white shirt and opens by defining what linearity means before touching any physics. No slides. No animations. A man, a board, and a room of students working through the hardest framework in science. MIT OpenCourseWare started this in 2001. Faculty were told there would be no royalties and no extra pay for filming. Adams builds the course from the ground up. He treats quantum mechanics as a framework first and the strange results as consequences, not tricks. The catalog now holds more than 2,400 courses. The lectures have been watched hundreds of millions of times by people who will never set foot in Cambridge. Someone in a village with a phone gets the same lecture a student paying 60,000 dollars a year gets. The tuition was never buying the lecture.
17:43

MIT filmed a full graduate-level quantum mechanics course and put every lecture online for free. The instructor is Allan Adams. He stands in front of a chalkboard in a white shirt and opens by defining what linearity means before touching any physics. No slides. No animations. A man, a board, and a room of students working through the hardest framework in science. MIT OpenCourseWare started this in 2001. Faculty were told there would be no royalties and no extra pay for filming. Adams builds the course from the ground up. He treats quantum mechanics as a framework first and the strange results as consequences, not tricks. The catalog now holds more than 2,400 courses. The lectures have been watched hundreds of millions of times by people who will never set foot in Cambridge. Someone in a village with a phone gets the same lecture a student paying 60,000 dollars a year gets. The tuition was never buying the lecture.

Gaspar

13,849 次观看 • 1 个月前

How IIT Madras is Changing Global Security The End of Hacking? IIT Madras is spearheading India's push into quantum-secure communications through the IITM-C-DOT Samgnya Technologies Foundation, launched as the National Hub for Quantum Communication under the National Quantum Mission. This initiative aims to make communications "unhackable" by shifting from math-based encryption to physics-based security, countering future quantum computer threats. ​ The hub, inaugurated in December 2025 at IIT Madras Research Park, partners with C-DOT and is funded by the Department of Science and Technology (DST). It focuses on developing indigenous quantum hardware, QKD networks, quantum repeaters, and satellite-based systems to protect critical infrastructure like AI data centers and defense networks. Traditional encryption relies on complex math that quantum computers will crack in years. QKD uses quantum physics: any eavesdropping alters the quantum state, alerting the system instantly and burning the key. IIT Madras claims an edge in secure transmission over computing leaders like the US and China. ​ The hub builds real-world testbeds, subsidizes hardware for startups, trains experts, and links globally via IITM Global outposts. It positions India to lead in quantum-secure networks for sovereign AI and government use within five years. ​ IIT Madras also runs CyStar, a cybersecurity center advancing quantum security, AI model protection, and IoT defenses since 2024. This aligns with national goals for unhackable comms amid rising cyber threats. Credit : AIM Network.
6:11

How IIT Madras is Changing Global Security The End of Hacking? IIT Madras is spearheading India's push into quantum-secure communications through the IITM-C-DOT Samgnya Technologies Foundation, launched as the National Hub for Quantum Communication under the National Quantum Mission. This initiative aims to make communications "unhackable" by shifting from math-based encryption to physics-based security, countering future quantum computer threats. ​ The hub, inaugurated in December 2025 at IIT Madras Research Park, partners with C-DOT and is funded by the Department of Science and Technology (DST). It focuses on developing indigenous quantum hardware, QKD networks, quantum repeaters, and satellite-based systems to protect critical infrastructure like AI data centers and defense networks. Traditional encryption relies on complex math that quantum computers will crack in years. QKD uses quantum physics: any eavesdropping alters the quantum state, alerting the system instantly and burning the key. IIT Madras claims an edge in secure transmission over computing leaders like the US and China. ​ The hub builds real-world testbeds, subsidizes hardware for startups, trains experts, and links globally via IITM Global outposts. It positions India to lead in quantum-secure networks for sovereign AI and government use within five years. ​ IIT Madras also runs CyStar, a cybersecurity center advancing quantum security, AI model protection, and IoT defenses since 2024. This aligns with national goals for unhackable comms amid rising cyber threats. Credit : AIM Network.

Augadh

11,978 次观看 • 6 个月前

Most people pay $50,000 for an MBA to learn what Chamath just taught Stanford students for free in one session. No tuition, no application, no waitlist, just Chamath Palihapitiya sitting in a Stanford lecture hall telling students exactly how to win in the AI era. The man who backed Facebook at $500M valuation and built a $1.5B fund just gave away his playbook for free. Watch it, bookmark it, send it to someone who needs it.
54:22

Most people pay $50,000 for an MBA to learn what Chamath just taught Stanford students for free in one session. No tuition, no application, no waitlist, just Chamath Palihapitiya sitting in a Stanford lecture hall telling students exactly how to win in the AI era. The man who backed Facebook at $500M valuation and built a $1.5B fund just gave away his playbook for free. Watch it, bookmark it, send it to someone who needs it.

Defileo🔮

19,004 次观看 • 3 个月前

Mrityunjoy Chakraborty, IIT Kharagpur professor: "Jane Street pays a 22 year old $500,000 a year for one skill: turning uncertainty into a number you can bet on. that number is the first thing this professor teaches, and it is free" this free lecture is the foundation every quant bot and hedge fund model is secretly built on. before the AI, before the strategy, there is one question. what is the chance this happens, exactly. get that number right and every bet after it is just math. get it wrong and no model, no bot, no amount of compute can save you. Chakraborty builds probability from the axioms up, on a blackboard, in notation a 15 year old can follow. Wall Street sells this as a $500,000 edge. an IIT professor hands you the source code for nothing.
58:21

Mrityunjoy Chakraborty, IIT Kharagpur professor: "Jane Street pays a 22 year old $500,000 a year for one skill: turning uncertainty into a number you can bet on. that number is the first thing this professor teaches, and it is free" this free lecture is the foundation every quant bot and hedge fund model is secretly built on. before the AI, before the strategy, there is one question. what is the chance this happens, exactly. get that number right and every bet after it is just math. get it wrong and no model, no bot, no amount of compute can save you. Chakraborty builds probability from the axioms up, on a blackboard, in notation a 15 year old can follow. Wall Street sells this as a $500,000 edge. an IIT professor hands you the source code for nothing.

Rossst.03

695,632 次观看 • 8 天前

String Theory is one of the few frameworks that tries to describe Quantum Physics and Gravity in the same mathematical language. In this animation, the glowing loop is the string, the shifting color along it represent its quantum vibration modes, and the surrounding fabric is a proxy for Spacetime responding. When you quantize a string, one of its vibration modes behaves like a graviton. So, geometry shows up as part of the same quantum system. #StringTheory #QuantumGravity #GeneralRelativity #QuantumPhysics #TheoreticalPhysics #PhysicsVisualization
1:00

String Theory is one of the few frameworks that tries to describe Quantum Physics and Gravity in the same mathematical language. In this animation, the glowing loop is the string, the shifting color along it represent its quantum vibration modes, and the surrounding fabric is a proxy for Spacetime responding. When you quantize a string, one of its vibration modes behaves like a graviton. So, geometry shows up as part of the same quantum system. #StringTheory #QuantumGravity #GeneralRelativity #QuantumPhysics #TheoreticalPhysics #PhysicsVisualization

Mathelirium

42,172 次观看 • 6 个月前

The only physicist ever to win the Fields Medal taught a full Princeton course in 2022. The recordings have almost no views. Edward Witten works at the Institute for Advanced Study. He reshaped string theory and large parts of pure geometry, and mathematicians gave him their highest prize for it. This is Physics 539, Topics in High Energy Physics, autumn 2022. Full semester, lecture by lecture, chalk on a board, graduate students in the room. No lecture notes released. No production. No description on the videos. Someone sat in the back row and hit record. Watch how little he writes. A few symbols, 1 small diagram, and the whole argument carried in speech while the board stays nearly empty. A theoretical physicist I know worked through the playlist over a summer and said it read like watching someone think in real time. Free on YouTube, uploaded by an attendee, no institution behind it. Universities publish the public talks. Somebody filmed the real course.
1:26:47

The only physicist ever to win the Fields Medal taught a full Princeton course in 2022. The recordings have almost no views. Edward Witten works at the Institute for Advanced Study. He reshaped string theory and large parts of pure geometry, and mathematicians gave him their highest prize for it. This is Physics 539, Topics in High Energy Physics, autumn 2022. Full semester, lecture by lecture, chalk on a board, graduate students in the room. No lecture notes released. No production. No description on the videos. Someone sat in the back row and hit record. Watch how little he writes. A few symbols, 1 small diagram, and the whole argument carried in speech while the board stays nearly empty. A theoretical physicist I know worked through the playlist over a summer and said it read like watching someone think in real time. Free on YouTube, uploaded by an attendee, no institution behind it. Universities publish the public talks. Somebody filmed the real course.

Gaspar

22,934 次观看 • 1 个月前

A theoretical physics course opens not with equations but with the rules for saying anything true at all. This is lecture 1 of Lectures on the Geometric Anatomy of Theoretical Physics, taught by Frederic Schuller. The topic is propositional and predicate logic. Most physics courses assume logic and start with mechanics. Schuller refuses. Before manifolds, before tensors, before a single physical claim, he builds the language the claims will be written in. The audience is advanced students who have already met the physics. He is going back under it and rebuilding the floor. Watch how precisely he states each rule, then shows what collapses if you loosen it. No appeals to intuition anywhere in the hour. A machine learning engineer I know worked through the first 10 lectures and said proofs stopped feeling like a different profession. Free on YouTube, green chalkboard, German lecture hall. Everyone starts with the physics. He started with what counts as true.
1:40:34

A theoretical physics course opens not with equations but with the rules for saying anything true at all. This is lecture 1 of Lectures on the Geometric Anatomy of Theoretical Physics, taught by Frederic Schuller. The topic is propositional and predicate logic. Most physics courses assume logic and start with mechanics. Schuller refuses. Before manifolds, before tensors, before a single physical claim, he builds the language the claims will be written in. The audience is advanced students who have already met the physics. He is going back under it and rebuilding the floor. Watch how precisely he states each rule, then shows what collapses if you loosen it. No appeals to intuition anywhere in the hour. A machine learning engineer I know worked through the first 10 lectures and said proofs stopped feeling like a different profession. Free on YouTube, green chalkboard, German lecture hall. Everyone starts with the physics. He started with what counts as true.

Gaspar

18,754 次观看 • 29 天前

Wall Street pays $600,000 for the skill of mastering business fundamentals, and now this 57 minute lecture from professor Krassimir Petrov gives it to you completely free This is the uncut university session. Just raw business education from a professor who has taught thousands of students what they actually need to succeed. You will learn what business schools don't teach you, learn how to think like a CEO, discover the core principles that separate successful entrepreneurs from everyone else. No fluff. No outdated theories. Just the fundamentals that actually matter. This lecture has over 2 million views for a reason. People keep coming back because it changes how they see business. Save it while you can ⭣
57:05

Wall Street pays $600,000 for the skill of mastering business fundamentals, and now this 57 minute lecture from professor Krassimir Petrov gives it to you completely free This is the uncut university session. Just raw business education from a professor who has taught thousands of students what they actually need to succeed. You will learn what business schools don't teach you, learn how to think like a CEO, discover the core principles that separate successful entrepreneurs from everyone else. No fluff. No outdated theories. Just the fundamentals that actually matter. This lecture has over 2 million views for a reason. People keep coming back because it changes how they see business. Save it while you can ⭣

mentalium

26,872 次观看 • 11 天前

SCIENTISTS TURN LIGHT INTO A MEMORY SYSTEM Scientists built a tiny photonic chip and sent identical photons through it, expecting messy quantum behavior. Instead, the light started acting like a memory system, forming patterns that match a classic AI model used for associative memory. In simple terms, the interference between photons did the math needed to store and recall patterns. No brain, no computer, just light physics doing the computing. Source: NewsForce
2:34

SCIENTISTS TURN LIGHT INTO A MEMORY SYSTEM Scientists built a tiny photonic chip and sent identical photons through it, expecting messy quantum behavior. Instead, the light started acting like a memory system, forming patterns that match a classic AI model used for associative memory. In simple terms, the interference between photons did the math needed to store and recall patterns. No brain, no computer, just light physics doing the computing. Source: NewsForce

NewsForce

29,578 次观看 • 5 个月前

An MIT professor solved the equation Wall Street pays $500K for, in a lecture about how to find the top of a hill. MIT put the whole thing online. it has been free for years. almost nobody finishes it. his point: finding the best possible answer to almost anything is one move. write down what you want to grow, take the derivative, and find the exact spot where it stops climbing. that spot is the answer. he is Denis Auroux, and his 18.02 lectures have taught more people calculus than most universities have students. now the equation from the post above, the one that tells you exactly how much to bet. it is not a secret formula. it is this. the growth of your money is a curve. bet too little and you are low on the hill. bet too much and you have gone over the top and started falling. Kelly's number is just the peak. no magic. no fund. one hill, and the single point where it stops going up. a quant I know rewatches this exact lecture before he sizes a single position. you were handed the formula and told to trust it. Auroux shows you where it actually comes from, for free, and it has been sitting there the whole time.
38:17

An MIT professor solved the equation Wall Street pays $500K for, in a lecture about how to find the top of a hill. MIT put the whole thing online. it has been free for years. almost nobody finishes it. his point: finding the best possible answer to almost anything is one move. write down what you want to grow, take the derivative, and find the exact spot where it stops climbing. that spot is the answer. he is Denis Auroux, and his 18.02 lectures have taught more people calculus than most universities have students. now the equation from the post above, the one that tells you exactly how much to bet. it is not a secret formula. it is this. the growth of your money is a curve. bet too little and you are low on the hill. bet too much and you have gone over the top and started falling. Kelly's number is just the peak. no magic. no fund. one hill, and the single point where it stops going up. a quant I know rewatches this exact lecture before he sizes a single position. you were handed the formula and told to trust it. Auroux shows you where it actually comes from, for free, and it has been sitting there the whole time.

Loran

95,357 次观看 • 1 个月前

This woman has celiac disease and has been gluten free for over 10 years now. She takes the precautions she needs to take so she doesn’t get sick. Today in the flight she was given a croissant and was told that it was gluten free. Only after she had already eaten that they told her a mistake was made and that it was a normal one. She’s now at the restroom after her flight and she’s trying to make herself throw up so that it may lesson the blow. Food allergies are a huge deal, should this airline be sued for this?
1:19

This woman has celiac disease and has been gluten free for over 10 years now. She takes the precautions she needs to take so she doesn’t get sick. Today in the flight she was given a croissant and was told that it was gluten free. Only after she had already eaten that they told her a mistake was made and that it was a normal one. She’s now at the restroom after her flight and she’s trying to make herself throw up so that it may lesson the blow. Food allergies are a huge deal, should this airline be sued for this?

SonnyBoy🇺🇸

1,156,724 次观看 • 5 个月前

Gilbert Strang, a quiet MIT professor, picked up a piece of chalk and explained the one skill standing between you and every account you have ever blown. MIT put the entire course online. it has been free for over twenty years. almost nobody finishes it. His point: the market never pays in certainties. it pays in probabilities, and a human gut can barely hold one straight. the math that holds ten thousand at once, weighs them, and collapses them into a single call is linear algebra. it is the branch Citadel and OpenAI both pay $400K to hire for. he is not a trading guru. his 18.06 lectures are the most watched math class on the planet. Skip to where he turns a wall of numbers into one vector. a single object carrying a thousand odds at once, in notation a beginner can follow. No slides. no jargon. one piece of chalk. a quant I know rewatches lecture one every year before he sizes a single position. You do not have a strategy problem. you have a math problem. the fix has been free for two decades, and you are still guessing.
39:31

Gilbert Strang, a quiet MIT professor, picked up a piece of chalk and explained the one skill standing between you and every account you have ever blown. MIT put the entire course online. it has been free for over twenty years. almost nobody finishes it. His point: the market never pays in certainties. it pays in probabilities, and a human gut can barely hold one straight. the math that holds ten thousand at once, weighs them, and collapses them into a single call is linear algebra. it is the branch Citadel and OpenAI both pay $400K to hire for. he is not a trading guru. his 18.06 lectures are the most watched math class on the planet. Skip to where he turns a wall of numbers into one vector. a single object carrying a thousand odds at once, in notation a beginner can follow. No slides. no jargon. one piece of chalk. a quant I know rewatches lecture one every year before he sizes a single position. You do not have a strategy problem. you have a math problem. the fix has been free for two decades, and you are still guessing.

Loran

47,494 次观看 • 1 个月前

A woman who spent nine years gluing paper models in a print shop just told a room of physicists their whole field stands on a mistake, one line, no hedging: "Every theory we have takes space and time for granted, like a bagel that forgot it was once a flat sheet of paper." That's Bianca Dittrich. She has a free lecture course that asks one question: what is left of geometry once you quantize it? The answer is: far less than you can picture. Quantum gravity looks like one more field theory. Buried inside is something stranger. Every quantum theory we have puts fields on a fixed stage, flat or curved, and does the physics on top of it. Here the stage itself is the thing being quantized. Your gut reads an atom of spacetime as a tiny grain sitting somewhere. Wrong. It cannot sit anywhere, because it is the somewhere. The move is invisible to human intuition, which is exactly why the people who get anywhere stop asking where the pieces are and start asking what a measurement even means. In 3D the whole thing collapses in a way that should scare you. No matter, no cosmological constant, and gravity is locally flat everywhere. Six degrees of freedom per point, all of them eaten by diffeomorphism symmetry. A field theory that ends up with finitely many real degrees of freedom, sometimes zero. None of it is hidden. Cut a parallelogram out of paper, glue the edges, and you have a torus. Flat everywhere, and yet two numbers survive that no local measurement can see. The lecture is free. Here is the trap: you feel every equation you can solve, every geometry you can draw, as progress. What you cannot feel is the gap you have to cross. Ten to the forty-one, from the Planck scale back up to the world you live in. And crossing it is the only thing that pays. Almost every approach still cannot show it recovers ordinary physics at the far end, and almost everyone quits long before then. The math is free to learn. The nerve to stop trusting your picture of space, that part you still have to bring yourself.
1:02:52

A woman who spent nine years gluing paper models in a print shop just told a room of physicists their whole field stands on a mistake, one line, no hedging: "Every theory we have takes space and time for granted, like a bagel that forgot it was once a flat sheet of paper." That's Bianca Dittrich. She has a free lecture course that asks one question: what is left of geometry once you quantize it? The answer is: far less than you can picture. Quantum gravity looks like one more field theory. Buried inside is something stranger. Every quantum theory we have puts fields on a fixed stage, flat or curved, and does the physics on top of it. Here the stage itself is the thing being quantized. Your gut reads an atom of spacetime as a tiny grain sitting somewhere. Wrong. It cannot sit anywhere, because it is the somewhere. The move is invisible to human intuition, which is exactly why the people who get anywhere stop asking where the pieces are and start asking what a measurement even means. In 3D the whole thing collapses in a way that should scare you. No matter, no cosmological constant, and gravity is locally flat everywhere. Six degrees of freedom per point, all of them eaten by diffeomorphism symmetry. A field theory that ends up with finitely many real degrees of freedom, sometimes zero. None of it is hidden. Cut a parallelogram out of paper, glue the edges, and you have a torus. Flat everywhere, and yet two numbers survive that no local measurement can see. The lecture is free. Here is the trap: you feel every equation you can solve, every geometry you can draw, as progress. What you cannot feel is the gap you have to cross. Ten to the forty-one, from the Planck scale back up to the world you live in. And crossing it is the only thing that pays. Almost every approach still cannot show it recovers ordinary physics at the far end, and almost everyone quits long before then. The math is free to learn. The nerve to stop trusting your picture of space, that part you still have to bring yourself.

Zyron

110,850 次观看 • 1 个月前

Stephen Boyd, Stanford professor: "Citadel will pay a 22 year old $400K to run this optimizer. The textbook that teaches it is free, and so was my course." this free stanford lecture holds the entire "optimal portfolio, perfect allocation" secret the trading gurus sell you. and the man teaching it didn't lock it inside a fund, he gave away the whole course and a textbook that costs $0. at the board it's simple: once you can write down your expected return, your risk, and your limits, convex optimization finds the single best portfolio, provably, not by trial and error. that's how a fund turns a messy pile of signals into one clean allocation. no guru required. it's not new either. boyd and vandenberghe's textbook has been free since 2004. same stack i mapped in the article above, old and free and sitting on a website the whole time. here's the honest part the course skips: the optimizer only allocates the edge you feed it. garbage in, garbage out. it can't invent an advantage that isn't already in your signals, it just sizes the real one without blowing you up. the solver is free. having an actual edge to optimize is the part nobody can sell you.
1:18:11

Stephen Boyd, Stanford professor: "Citadel will pay a 22 year old $400K to run this optimizer. The textbook that teaches it is free, and so was my course." this free stanford lecture holds the entire "optimal portfolio, perfect allocation" secret the trading gurus sell you. and the man teaching it didn't lock it inside a fund, he gave away the whole course and a textbook that costs $0. at the board it's simple: once you can write down your expected return, your risk, and your limits, convex optimization finds the single best portfolio, provably, not by trial and error. that's how a fund turns a messy pile of signals into one clean allocation. no guru required. it's not new either. boyd and vandenberghe's textbook has been free since 2004. same stack i mapped in the article above, old and free and sitting on a website the whole time. here's the honest part the course skips: the optimizer only allocates the edge you feed it. garbage in, garbage out. it can't invent an advantage that isn't already in your signals, it just sizes the real one without blowing you up. the solver is free. having an actual edge to optimize is the part nobody can sell you.

Rossst.03

72,607 次观看 • 2 个月前

An MIT professor finds the prize behind a thousand doors by opening ten. no faster running. he just skips every door it cannot be behind. the lecture is called algorithmic thinking. 6 million people have watched it, and it has been free the whole time. brute force checks every door, one by one. a real algorithm throws away half of them with every step. same answer, a thousand times fewer moves, zero new hardware. now read the post above. that is Wall Street paying $300 million for the opposite. they drilled a cable through a mountain to open the same thousand doors 3 milliseconds faster. Devadas just stopped opening most of them. that same move is every search engine, every trading model, every small AI that beats a bigger one. the edge was never the speed of the machine. it was the shape of the idea. no cable. no mountain. one better idea. a quant I know says one algorithm rewrite beat a full year of latency upgrades on his desk. they spent $300 million to run the long way faster. the shortcut has been free for over a decade.
50:28

An MIT professor finds the prize behind a thousand doors by opening ten. no faster running. he just skips every door it cannot be behind. the lecture is called algorithmic thinking. 6 million people have watched it, and it has been free the whole time. brute force checks every door, one by one. a real algorithm throws away half of them with every step. same answer, a thousand times fewer moves, zero new hardware. now read the post above. that is Wall Street paying $300 million for the opposite. they drilled a cable through a mountain to open the same thousand doors 3 milliseconds faster. Devadas just stopped opening most of them. that same move is every search engine, every trading model, every small AI that beats a bigger one. the edge was never the speed of the machine. it was the shape of the idea. no cable. no mountain. one better idea. a quant I know says one algorithm rewrite beat a full year of latency upgrades on his desk. they spent $300 million to run the long way faster. the shortcut has been free for over a decade.

Rossst.03

81,024 次观看 • 25 天前