I'm sorry - I've let this group go dormant, and worse, it's been sending out spam :( Well, I've deleted all the spam accounts (I think), and changed the...
Folks, I have mentioned that in reading RtR I keep stopping in an attempt to learn something about yet one more branch of mathematics. ;-) I have a bunch of...
Hello, like everyone else in this group I'm fascinated by physics and a bit frustrated by popularizations that steer clear of the math. Without the math, i...
Hi everyone! I am new on this RTRfans group. I recently acquired a copy -fresh one spanish version- of Sir Roger Penrose's book TRTR. What can I say? I have...
I haven't had much luck in searching, except for a few isolated suggestions. I see there was a website that was never finished. Has no one compiled a list of...
I am interested in some ongoing discussion regarding RtR. Are there those here who are still engaged with the book or related books? I have just finished...
I'm posting this message as an example of an introduction from a new member. I encourage people to do this when they sign up. I've been reading this book for...
Hi everyone! I guess there hasn't been much activity on the list lately. I've been pretty busy myself, not much time to read RTR or anything else. It seems...
Hi! I noticed this question about exercise 15.5 seemed to be outstanding for a while. Let me repost the post from sci.math here (by Knarfian) and give some...
Nice notes on QFT up to Strings: Quantum Field Theory to Strings Mirkovic (links to more) http://www.math.umass.edu/~mirkovic/QFT/QFT/qft.IvansNotes.pdf ...
In the last few days, I have successfully making a start on Quantum Field Theory through A. Zee's "Quantum Field Theory in a Nutshell". Those of you who have...
John Baez is a moderately famous physicist and runs one of the more informative physics sites (more or less a text only, super blog): A Chat With Penrose John...
In the recent scientific american, there is a feature about alain connes, the "creator" and head proponent of non-communtitive geometry. Connes and NCG is...
Hi All, Since the practice here is to write a short intro whenever someone joins a group, I'll follow suit. I have a BSc in Mathematics, a BE (Hons) in...
Originally, I started this post to mention the first few items found through the excellent PhysicsForums. Then I kept finding more and thought it not worth the...
What is the relationship between a Lie Derivative, commonly seen in General Relativity texts, and Lie Groups/Algebras? Is there any significant? New finds in...
Hi, As per the group's regulations I am posting to introduce myself to other members. My name is Susan, and I am currently studying for a BSc. degree in...
This intriguing flash demonstration of "Imagining the Tenth Dimension" was unconvincing to me: http://www.tenthdimension.com/flash2.php ...but I am posting it...
Today, I finally got clear on the basic difference and relationship between Configuration Space and Phase Space. Configuration Space is the space of all...
By the time you finish RTR you realize that Penrose is generally negative towards String Theory, at least as a total and final theory of Reality. While Penrose...
Textbook, lectures, animations, Mathematica notebooks: http://www.courses.fas.harvard.edu/~phys16/Textbook/ Videos link is present but this seems to be...
Einstein's Equation and Twistor Theory: Recent Developments Dr. Roger Penrose, ITP & Oxford University http://online.kitp.ucsb.edu/online/gravity99/penrose/ ...
Caltech's Physics 237-2002 Gravitational Waves Kip Thorne Course Materials (Real media link works) (Other lecturers will appear also.) Does NOT assume a...
MIT OCW: 8.224 Black Holes: Gen. Relativity & Astrophysics Sp. 2003, Lecture 1 of 6 (Google Video) http://video.google.com/videoplay?docid=-6597337232714168817...
Most of the members here seem to have a good a grasp of mathematics at an advanced level, so "The Shape of Space" by Jeffrey R. Weeks may not be of direct...
Are wedge products defined the same in various areas of mathematics? For instance the wedge product in Geometric Algebra (Clifford, etc) and the wedge product...
Today, I was cleaning up my references, specifically the topic of Complex numbers and thought this might help someone. (Some of the follwing contains rough...
Starting from CERN, and going world wide to hear from many experts... [I had a little trouble getting it to start, but fiddling around was enventually...
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