Here are the rules:
- Grab the nearest book.
- Open the book to page 123.
- Find the fifth sentence.
- Post the text of the next 3 sentences on your blog along with these instructions.
- Don’t you dare dig for that “cool” or “intellectual” book in your closet! I know you were thinking about it! Just pick up whatever is closest.
The transformation of components of the second rank ημν transform by
η’αβ = Λαν Λβμ ημν
by comparison with Eq. (4.26), η’αβ = ηαβ. Thus ηαβ has the same components in all frames, as we have assumed.
From Radiative Processes in Astrophysics by George B. Rybicki and Alan P. Lightman. No lie — that’s the book I have out on my desk at work. Maybe I’ll try at home tonight, and see what’s lying around there.
[Link from Mr. Hassle’s Long Underpants]