Thanks.

Why are all of cmsa videos hazy

Thanks.

Thanks.

John Baez and Ed Witten seem to be converging as age goes to infinity. Facially, I mean.

What is the question / anticipation at 1:12:35 ? I cannot make it out

Lecture begins 3:10

Thanks Prof. Baez. It's great how you connect all these concepts and hearing you speak is very insightful

Lecture begins 8:40

I too expect that ultraviolet physics is Lorentz invariant in the sense of my Bayesian prior peaking there, but I think it's worth noting the argument Harlow alludes to (which I think in the literature was first mentioned in '04 by Collins et al.) assumes that Lorentz violation is 'generic' in turning on any Lorentz violating operator. But of course if there really is fundamental Lorentz violation it should come with some sort of special structure that makes its effects non-generic. Already in noncommutative spaces (which you can find as string vacua) there are enhanced such properties that make the Lorentz violating effects smaller. There could plausibly be even more exotic non-Riemannian spaces that do even better at sequestering these effects.

Nice work

@58:20 why does the time coordinate wrap around at that point, in the context of the previous calculation of the partition function of the left moving waves on the circle/cylinder?

@22:54 why are these 2 properties "integral" and "even" so important to the subject? Is there an "a priori" reason to isolate these definitions?

Great talk! Easy to follow and good handling of questions

Good to see a follow up on the lectures on 5, 8 and 24. They were about ten years ago?

❤

@13:00 I think that the spelling of the mathematician who penned the book on Morse theory is "Milnor" (not Milner as it was spelled by the closed caption generator.).

i see bordisms depictions Bryce deWitt used to call "trousers topology" - funny name

Speaker is so inspirational

hello nice video

Very interesting, Seth, good work. Yet l find it too verbose. Try to start with a synthesis of less than a minute. And kindly avoid those conjure jungle words of your tribe, mm, uh, emm, ough 😩.