Recent content by arivero

Hmm I am intrigued by the initial " Here's your text with the changes you requested:" Does it mean that the IA had all this info? Usually KK non abelian refers to a short burst of research between 1981 and 1986; the research in the sixties was more about quantised fields on curved spaces.

I see, this is the third edition, that already uses Dirac notation: Is it the same in the 1932 edition?

Going to check, thanks. It makes sense because Feynman claims to have got is insight from Dirac, I think from some work on contact transformations. But also [I believe to remember that he told...] that he was unable to agree with Dirac on the significance.

I think that the lore on the need of having probability interference in quantum mechanics and then a complex probability originates in Feynman interpretation of space-time paths, whose probability is weighed with a complex exponential that approaches a dirac delta. But I can not pinpoint a...

What I recall in the 80's the hope was 7+4=11, from supergravity and the point that 11D formulations of gravity had a lot of mechanics of tensor decomposition and dualities, favouring objects with a foot in the 7 and other in the 4. Time itself is a different thing. The best lore is to guess...

The best known continuation of this idea is a paper from Wilczek - Zee, where they try to get one mass from the other via some electromagnetic loop, so the alpha is justified. Then for the mass of electron alone you have an argument in the first book of Polchinski, where he remarks that the...

Speaking of awareness, I took a time to try to understand why diquark research is not finding the same diquarks that here. It seems my preprints use the "worse spin zero diquarks" in the nomenclature of Jaffe's Exotica. And using 5 flavours it is really the ##(15, \bar 3)##. That means, as it...

note that textbooks tag is misleading and a lot of interesting graduate level material is just "books"...

Yep I was aware, it was one of the motivations to keep hope, but I don't like that it implies a lot of extra content.

Thinking about, we keep speaking about string theory, but a good starting point could be the MSSM with unbroken SUSY, and then just break the higgs pretty maximally, with infinite mass for W and Z0 so that the fermions have only SU(3)xU(1) interactions. Is there any paper or textbook doing...

Boya was particularly intrigued by the case where the superpotential is the sign function, so the two pairs are delta potential and delta barrier. I was assigned to look into it but I was never explicitly told to focus in susy pairings so I let it to pass. Surely it is done elsewhere in the...

Ah thanks for the reminiscence, I did some calculations for https://inspirehep.net/literature/355497 a preprint then. I guess I should check it again. It was a line of research starting from https://inspirehep.net/literature/18852 in the time that Boya was going back and forward to utexas, but...

https://inspirehep.net/literature/1395565 did u mean this link?

Yeah, Hilbert-Schmidt norm is very pedantic :smile:. But once one goes to Tr A A^+, a lot of stuff can appear. Still I am worried I do not know how lo look fundamental books on this "theory of trace invariants". For instance I was very surprised when I considered the complex generalisation; the...

ADDENDA: A consequence of this line of thought is that it allows us to reformulate R. Foot observation in the most abstruse algebraic way possible. Consider that being at 45 degrees of 1,1,1 means that the projection into the diagonal and its orthogonal have the same size. Consider the 3x3...