Recent content by strangerep

Today, I became aware of the 50-yr anniversary performances of various Mike Oldfield masterpieces, done in collaboration with the Royal Philharmonic Orchestra(!) in 2022. I'm not sure if this counts as a "cover", but they sure deserve a mention. I'm still listening this version of Ommadawn Pt 1...

The 1-postulate (group theoretic) derivations of SR do answer that. They show that it (or more precisely, the ##\lambda_v## constant I mentioned earlier) is a mathematical consequence of the Relativity Principle (given also spatial isotropy and some Lie group technicalities). [I feel a...

I've written about that "something" multiple times on PF, and @Ibix already alluded to it in post #3 of this thread. The short version is that the Principle of Relativity (without the Light Postulate) implies the existence of a universal constant (which I've previously called ##\lambda_v##) with...

Sheesh! I really wish more people would actually study this type of paper before posting opinions. OK, here goes... Seifert solves the vacuum(!) Einstein field equations in cylindrical coordinates. She has in mind the case of "cylindrically distributed" matter. (She seems unaware that many...

In position space, one typically uses differential operators to represent the Poincare generators. E.g., ##\partial_x## generates translations in the "x" direction. So I'm not sure why you want to use matrices (even though of course one can use 5x5 matrices for that purpose). And what...

Usually, I think cover versions of my favorite songs are rubbish. But,... ain't bad. Here's the original: It's very hard to surpass Mike Oldfield's masterful guitar work.

I get the feeling you didn't read (or don't remember) section 1.4 "Hilbert Space and Rigged Hilbert Space". (?) We've had extensive threads on PF about this. Try doing some searches. :oldsmile:

Huh? Your line element suggests a metric with signature ##(+,-,+,+)##. :oldconfused:

Have you successfully published your work in any reputable journal?

There are papers on gravity-induced decoherence, and similar, by L.H.Ford et al, which should be easily googlable. IIRC, a statistical distribution of gravitational interactions with many other particles nearby can make off-diagonal terms in the density matrix decrease rapidly to zero...

I just noticed this cover of Gollum's Song (from The Two Towers) by Alina Gingertail. Questions: what is the 1st instrument that appears? It seems to be played with a bow and levers. Also, what is the small compact wind instrument that appears later?

Just now, I became aware of Diana Ankudinova (incredible range of pitch): Cover of "Wicked Game": Cover of one of the main Dune themes:

Hmm,... those tuba players are doing to the original song what the rednecks did to Ned Beatty in the film?

I just became aware of the "Kiffness" channel on youtube... So clever.

Well,... for some of us it's...