Recent content by strangerep

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...

I've recently discovered that I quite like Clamavi de Profundis. Here's their cover of the Misty Mountains song from The Hobbit. I really like their deeper harmonies and slightly modified way they move between certain chords. This is the 8min version. There's also a 20min(!) version. On the...

(I only noticed this post just now.) I agree, it's not very good, (meaning: not up to MC's usual standard). I listened (briefly) to some other attempted covers of Comfortably Numb but I get the feeling most who attempt it are basing themselves on the original studio version, instead of the...

If you're referring to Einstein's "nonsymmetric UFT", well,... imho it's total rubbish. His cavalier manipulations of the two lower indices on the connection components shows that he didn't really understand the true purpose of the connection object in the context of differential geometry. It's...

Thanks. I have another instrument question: Near the start of at 0:19 there's a brief sound like a rocket launching, just before the thumping bass line drops. What's the instrument producing the rocket-launch sound? Synth? Electric Guitar?