pessimist
20 hours ago
Underrated even among physicists. Among the immediate post war generation his contributions are up there with Feynman and Schwinger.
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."
MengerSponge
15 hours ago
The Yang in Yang-Mills is the same Yang as Lee-Yang! Somehow I had those filed as a different generation, where Lee-Yang is "old", and Yang-Mills is "young". I'm an idiot
gsf_emergency_4
12 hours ago
The path from Lee-Yang to Yang-Mills is short (~months) but the shortness is instructive
(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
kurtis_reed
14 hours ago
How do you know he's underrated?
tasuki
6 hours ago
I think it's so obviously a personal opinion it didn't need explicit mentioning.
gsf_emergency_4
16 hours ago
In order to explain his impact to people, someone could find a friendlier name for "gauge"?
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.
scotty79
6 hours ago
The word gauge is completely opaque to me, invokes no reasonable connotation.
I always wished they gave this thing a better name but I have no idea what.
cvoss
18 minutes ago
It's named that for a reason. It has to do with invariance under an arbitrary selection of parameters like scale, hence, choice of railroad gauge.
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.
MengerSponge
15 hours ago
> friendlier name for "gauge"?
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!
gsf_emergency_4
14 hours ago
Sorry: gauge-field.
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!