Chen-Ning Yang, Nobel laureate, dies at 103
chinadaily.com.cn
chinadaily.com.cn
To quote Freeman Dyson: "Professor Yang is, after Einstein and Dirac, the preeminent stylist of the 20th century physics. From his early days as a student in China to his later years as the sage of Stony Brook, he has always been guided in his thinking by a love of exact analysis and formal mathematical beauty. This love led him to his most profound and original contribution to physics, the discovery with Robert Mills of non-Abelian gauge fields. With the passage of time, his discovery of non-Abelian gauge fields is gradually emerging as a greater and more important event than the spectacular discovery of parity non-conservation which earned him the Nobel Prize."
Some say that list of stylists would not be meaningful without von Neumann (although Dyson might say that frogs have no style*)
https://youtu.be/OmaSAG4J6nw?t=24m19s
Please see next slide for a minimal example of a "real(!) gauge field", even if you don't like philosophy of physics.
Do you suppose small-gauge railroads are too niche an interest? Or is "gauging" interest not friendly?
It's abstractions all the way down, but the term was coined in its still generally used definition of "scale". To explain the concept to the general public, keep it simple and poetic. If they want to unpack your metaphor, they're going to need a few years of university physics education!
It's poetic and you can pardon the french but the combination is alien.
Poetry is hard: a poetic way to say "co-ordinate transformation" or "tensors" could help students to calculate with them. I'd suggest "shear-squeezing-your-xray-lens" for everything but I fear the backlash from teachers because that would take a doctorate (or more) to unpack!
They also believe that objects keep moving after you push them because they retain a memory of your push, and when that force runs out the objects come to rest*
You are not, will not, cannot teach them how to do a meaningful modern calculation in a single conversation**. Hell, Feynman's lectures were a failure: they didn't serve the audience he was supposed to be teaching (first year students).
So are you talking to students? Or is this a cocktail conversation? Because those are two very different settings.
*&**) These points are extensively documented in the PER literature. SciComm is really important and really useful, but it's not the same as effective pedagogy.
At the same time, I learnt to design a better force diagram than displayed in the assigned textbooks (many of which I suspect were influenced by Feynman)..
Which is kinda my point. That the status quo kinda suck doesn't mean the notation or examples can't be improved upon. It's heartening that we're entering a post-textbook age..
I wasnt so interested in scicomm up there because I suspect that the "slow" uptake of Yang's ideas had more to do with bad pedagogy
I always wished they gave this thing a better name but I have no idea what.
At least they tried to give a descriptive name! Most ideas are named after the people who are most closely associated with them. Yang-Mills. Newtonian. Euclidean. Planck. Many of those names invoke very specific ideas, even though eponyms are about as opaque as they come.
Could you elaborate on that?
(It's more than just a lesson in style, imho. Lee-Yang could become more famous than Yang-Mills, in time! Like you're implying there-- that was a honest mistake on your part; your claim to "idiocy" teaches less than it might seem :).
See this comment which might seem completely throwaway https://news.ycombinator.com/item?id=45632370)
In the same vein, here is a short-note of Yang, readable to nonscientists, here:
https://doi.org/10.1142/S0217751X03017142
(He rebuts Dyson)
Necessary Subtlety and Unnecessary Subtlety
Have you ever seen The Timetables of History? It re-syncs world events that you learned about from disparate sources. I kind of need that here!
(Esp. the "reification" of TRI-breaking)
Some of his work: http://home.ustc.edu.cn/~lxsphys/2021-3-18/The%20conceptual%...
And: https://en.wikipedia.org/wiki/Yang%E2%80%93Mills_theory
What did he have to say?
“ One story in particular illustrates Chandrasekhar's devotion to his science and his students. In the 1940s, while he was based at the University's Yerkes Observatory in Williams Bay, Wis., he drove more than 100 miles round-trip each week to teach a class of just two registered students. Any concern about the cost-effectiveness of such a commitment was erased in 1957, when the entire class -- T.D. Lee and C.N. Yang -- won the Nobel Prize in physics.”
He once "leaked" the idea that Jim Simon's trading success came from his use of ideas called "gauge theory" and "fibre bundles".
I forgot the exact timestamp, but you will have to watch the entire interview to find that segment — https://youtu.be/zVWlapujbfo
RenTech is quite secretive, but this supports the rumors that simple graphical models for time series were behind some of their trading strategies.
Brown and Mercer (who became ideologically opposed co-CEOs)
https://old.reddit.com/r/algotrading/comments/k299vp/were_br...
"Speech recognition" in those days meant Markov too
https://arxiv.org/abs/hep-th/9710148
https://www.amazon.com/Physics-Finance-Modelling-Non-Equilib...
I don't think it's a crackpot theory. The basic idea is that the gauge group is the group of rescalings of the units of money, and arbitrage appears as curvature in the gauge field, i.e. you end up with a net change when you parallel-transport money around a loop in the (discrete) space of assets and time.
https://www.feynmanlectures.caltech.edu/flptapes.html
#52 Symmetry in physical laws
https://en.wikipedia.org/wiki/Yang_Chen-Ning
RIP
Rest In Peace.
> Ning attended the prestegious Princeton Institute for Advanced Study.
Yang-Mills theory for electro-magnetic force is grounded in integratable systems, a gauge theory in statistics, etc for elementary particles.
Strange to think that revolutions, unrest, the Sino-Japanese war, and the civil war all provided better conditions for fostering top talent than Mao's China did.
I think it is bit more nuanced than just Mao, pre 1935 you could do ground breaking research in almost any field with limited to no funding at all. Since the war you need increasingly large amount of budgets which western universities with full government support enjoy, ans it was not possible to compete for India or China or even the Soviet Union to keep up.
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The cultural changes you allude to, certainly were a medium term negative factor, but the pre 1950 setup were hardly sustainable or efficient. In pre Mao China or similarly British India (or even till recently) it was not a meritocracy there was a privileged elite who had all the opportunity and few shined if they were also talented.
Today China is one of the most meritocratic economies after all - despite all the authoritarian flaws, we are only seeing positive growth in foundational scientific research and rapidly in contrast with the rising anti-science sentiment we are seeing in so many parts of the western and western influenced world.
The socio-cultural reset was important and necessary for both China and India to progress, the methods of the Mao era are questionable both for their cruelty and also for how efficient and effective they were it was just bad all around however the need of the reset came from a valid place I think.
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There is whole dimension of bias which does disadvantage particularly Chinese research output today. Don't get me wrong I am not saying there is conscious bias against Chinese researchers. The bias is because despite the esteem the Nobel prize is not a global one.
The committee sit in Scandinavian countries closely working with Norway government. The members are predominately affiliated to western universities and fluent in English or other European languages and read Nature / Science type of western journals.
This always put Soviet researches before and now Chinese and Indian(to a lesser degree) at a disadvantage compared to their western peers.
The committee are not equipped to judge the research output of the whole world, till recently this was not a problem, because western research post WW-II was the majority of the world output, but that is increasingly not true and in a multi-polar world.
Also for killing tens of millions of people, which not only is murder of each person but also those millions of people - and then their families - never benefit.
They were misguided, ineffective, and directly or indirectly killed people in the millions.
I am just pointing out that, the atrocities of the era doesn't justify seeing pre 1960s or pre1950s years of China with rose tinted glasses as a better era, it wasn't unless you were in the elite.
It would be no different than seeing the 1970s or any earlier generation in U.S. history as a better era. Only a very small in-group perhaps had it good. Everyone else be it black, women, indigenous, various immigrants, religious, neuro or sexually diverse have only seen net improvements in last 300 years.
But are you saying reform and change were unnecessary? The people of China were suffering immensely; the country had been in a state of domestic violent conflict, on and off, since before 1911 (as of 1949). The Communist Party became more corrupt.
Mao's policies and politics made all that much worse, but that doesn't mean nothing needed to be done.
That development would have continued.
I understand the anger and the desperation that made the Communist takeover possible but doing nothing at all and keeping all the elites in charge (instead of replacing them with new ones) would have been better.
> China was already developing economically and technologically
That's an odd version of history. China just went through WWII, including the awful Japanese invasion, which interrupted a massive civil war that restarted afterward, and which followed decades without a real national government.
> there was a large migration of Chinese to the area after it came under Japanese control
Japanese control didn't work out well for Chinese people, to say the least.
> keeping all the elites in charge
The elites had led China to disaster for a century, 'the century of humiliation' it's called (though blaming outside forces, which do deserve some blame).
> replacing them with new ones
Here we agree.
> would have been better
Certainly there is no source that can more than guess at that.
The better option would have been true democratic reform. It has worked superbly well in parts of China - Taiwan and Hong Kong. It was starting to work in 1989, and leaning in that direction before Xi.
I wonder to what extent that lead to the curbing of consideration of those behind the iron curtain.
One datapoint: Sir John Barrow, Second Secretary to the Admiralty from 1804--1845, was part of a British envoy to China in the 1790s. Attempts to impress the Emperor with British science and technology left far less an impression than was hoped, with the Emperor dismissing the demonstration. A brief account of this being in the biography Barrows Boys by Fergus Fleming (1998).
China does have a long history of scientific and technological development, though by the 20th century this was all but forgotten / overlooked by the Chinese themselves, and it fell on an outsider, Joseph Needham (TK-chinese) to reacquaint them with this past, in Science and Civilisation in China, a 30-plus volume work begun in the 1950s and still in production.
But, since the Nobel was established, China has been invaded by Germany, Japan, Russia, Britain (largely India), France, the United States, Italy, Austria-Hungary, and Japan again, and had a civil war which hasn't technically ended (plus the end of the Boxer Rebellion), a revolution, and the worst famine in human history. But probably the worst event for its Nobel chances was https://en.wikipedia.org/wiki/Cultural_Revolution. The civil wars also brought to power brutal dictatorships, including in the so-called Republic of China.
The US has been invaded zero times and had zero civil wars during that period, and in the US, the Cultural Revolution and dictatorship are just starting. Consequently many people who might have been Chinese, German, Japanese, Russian, etc., during the period in question were instead born in the US. And note that, on the page I linked above, 6 Nobel laureates from the US were actually born in China: Charles K. Kao, Daniel C. Tsui, Edmond H. Fischer, Yang, Tsung-Dao Lee, and Walter H. Brattain (!).
13 according to https://en.wikipedia.org/wiki/List_of_Chinese_Nobel_laureate..., including peace prize laureates Liu Xiaobo (2010) and the 14th Dalai Lama (1989).
> But, since the Nobel was established, China has been invaded...
> The US has been invaded zero times...
The number of external invasions is not a strong indicator of the number of Nobel Prizes, if you compare all countries, beyond just China or the US.
And as you mentioned, the Cultural Revolution greatly reduces the chance of Chinese Nobel, so internal events can take a large role. And Mao led to more deaths—not to mention destruction to science and culture—than external invasions in the last century combined.
> The civil wars also brought to power brutal dictatorships...
The dictatorship arguably hasn't ended, by taking another less brutal form. And to be precise, CCP brought the civil wars and its consequences, not the civil wars brought dictatorships.
I guess we'll see Chinese scientists winning Nobels at a rate commensurate with other big countries in 20–40 years or so.
Count points:
- Intellectuals, academics, and teachers were persecuted, attacked, and killed by the youth (the Red Guards), in all schools and institutions in China.
- Search for “scholars killed during the cultural revolution”, or “list of scholars abnormally died in China during the cultural revolution” (or for a short list in Chinese https://zh.wikipedia.org/zh-cn/中华人民共和国被迫害人士列表#科学技术人士). This includes the leader of Two Bombs, One Satellite (nuclear weapon, ICBM, artificial satellite) 赵九章. Besides, those returned from overseas were considered traitors or spies, and just within the Chinese Academy of Sciences (top science institution), there are 229 scholars died due to the Cultural Revolution [1]. This destroyed the environment needed to do great science. Imagine if Yang went back to China in the early 1950s.
[1]: https://blog.wenxuecity.com/myblog/74771/201904/2157.html "文革时中科院131位科学家被打倒 229人遭迫害致死"
> I guess we'll see Chinese scientists winning Nobels at a rate commensurate with other big countries in 20–40 years or so.
Such predictions—Chinese scientists will win more science Nobels—has been made long ago. In 1998, “The Chinese-American Nobel Laureate Chen Ning Yang has also predicted that mainland scientists will win a prize within twenty years – even more than one, if the country’s economic development continues at its current rate.“ [2]
[2]: https://china-us.uoregon.edu/pdf/Minerva-2004.pdf "CHINESE SCIENCE AND THE ‘NOBEL PRIZE COMPLEX’"
But reality shows otherwise, not until scientists and academics are respected in China. During COVID, politics overruled science, resulting in the Zero-COVID policy, which were brought down by widespread protests, not by science (counter evidence to the ineffectiveness of the Zero-COVID policy).
Unless you are implying that you predict a regime change by that time...
Chen-Ning Yang was technically not wrong with his 1998 prediction, since Tu Youyou got 1/3 of the 2015 Nobel in medicine, but it didn't really make sense for him to link this to continued development, since the delay between discovery and award means that most of the prizes from 1998–2018 were for work that was already done before he made his prediction.
Over the same time frame, tertiary school enrollment went from 6.3% to 53.4%, and my 20–40-year prediction is based on a guess of how long it will take for the work of all those freshly-minted scientists to enter the range of consideration for a Nobel.
> Chen-Ning Yang was technically not wrong with his 1998 prediction, since Tu Youyou got 1/3 of the 2015 Nobel in medicine, but it didn't really make sense for him to link this to continued development, since the delay between discovery and award means that most of the prizes from 1998–2018 were for work that was already done before he made his prediction.
Agreed. Though to nitpick, the part on “even more than one, if the country’s economic development continues at its current rate” is technically wrong, if we just count Chinese Nobel scientists developed in Mainland China (only Tu Youyou).
Chen-Ning Yang was bullish on Chinese science, but reality did not deliver.
Shing-Tung Yau is as bullish on Chinese mathematics in the future, but even he admitted that China is still decades behind in mathematical research, due to systematic issue which ‘“places too much emphasis on material rewards” and tends to encourage young researchers to work for titles instead of scientific advancements’. [1]
[1]: https://archive.is/MRDlP "China has problems to solve before its mathematics research can rise above WWII levels, scholar says"
This is a problem with the culture of science.
That is such an interesting characterization of the territorial disputes between PRC(and/or ROC) and RoI.
To see the Tibetan military expedition as an invasion of China, means to accept the Qing dynasty and its successor states (ROC,PRC)claim of sovereignty and not suzerainty over Tibet. A claim at the time which was not recognized by other countries specifically Russia, Britain and also Tibet.
The refusal of Tibetan government to accept terms of treaties they were not party to directly (i.e. the ones Qing China signed) was the official reason stated for the invasion by the British.
Either way it is a deeply contentious topic never legally settled in the 1907 agreement and had implications both to that era and modern geopolitics. No one then or now is purely looking at merits of the arguments.
The points will end up into esoteric discussion on whether is kowtowing and kneeling are the same thing, or is acknowledging supremacy is same as sovereignty, or the differences between vassal state or autonomous region or protectorate or suzerain.
Also the views of the countries/entities (or their successors) have also changed including the Tibetan government-in-exile in the last 120 years.
My knowledge of history is at best a passing student at high school level, this kind of discussion requires deep understanding of relationship of states, and of Chinese culture and language during Qing dynasty i.e. professional expertise which I certainly don't have.
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[1] My initial read was they meant either Arunachal Pradesh( South Tibet to the Chinese), Aksai Chin or the MacMohan line etc, but they clarified it wasn't the case.
Therefore, people got high-level education who want to pursue a research career would have less chance to get a job in China (at least mainland) and had to go to U.S., EU or Japan to utilize their knowledge.
In fact, until now, U.S. still offers the highest the research funding to its universities. That's why there're so many Chinese students in U.S. schools.