Reference: Moore, Thomas A., *A General Relativity Workbook*, University Science Books (2013) – Chapter 19; Problem P19.6.

Here’s another example of the Riemann tensor… 94 more words

Reference: Moore, Thomas A., *A General Relativity Workbook*, University Science Books (2013) – Chapter 19; Problem P19.6.

Here’s another example of the Riemann tensor… 94 more words

Last week, I had ordered ‘Programming the universe’ by Seth Lloyd. Partly because I have read about him and listened to his online talks earlier, also partly inspired by the reference to him by Scott Aaronson, whose… 522 more words

Reference: Moore, Thomas A., *A General Relativity Workbook*, University Science Books (2013) – Chapter 19; Problem P19.5.

Another example of the Riemann tensor in a 2-d space. 80 more words

Paul Walker’s sudden death in an automobile crash in November was devastating to his millions of fans. It also presented a challenge for Relativity, distributor of action movie “Brick Mansions,” which had been scheduled for a February release. 223 more words

Reference: Moore, Thomas A., *A General Relativity Workbook*, University Science Books (2013) – Chapter 19; Box 19.5, Problem P19.1.

We can form contractions over the indices of the… 181 more words

Reference: Moore, Thomas A., *A General Relativity Workbook*, University Science Books (2013) – Chapter 19; Box 19.4.

Another relation of the Riemann tensor involves the covariant derivative of the tensor, and is known as the Bianchi identity (actually the second Bianchi identity; the first identity is the… 161 more words

What I’m about to claim will probably either come as a shock or confirm long-held suspicions: the scientific method—that system of coming up with and then experimentally testing hypotheses that we learned in middle school—is… 718 more words