A Question on Equation in Zee's Gravity in a Nutshell P107

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The discussion identifies a potential misprint in Zee's "Gravity in a Nutshell" on page 107, suggesting that the curvature G for a sphere of radius a should be 1/(a^2) instead of a^2. Participants confirm this interpretation, agreeing it appears to be an error. Additionally, there is a query regarding page 306, where it is questioned if B(t,r) and A(t,r) should include square roots, to which the response is affirmative. The conversation highlights the importance of accuracy in mathematical texts. Overall, the thread focuses on clarifying specific equations in the book.
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In Zee's Gravity in a Nutshell P107, 13 lines from the bottom, for a sphere of radius a, should the curvature G be 1/(a^2) instead of a^2?
 
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vaatmoly said:
In Zee's Gravity in a Nutshell P107, 13 lines from the bottom, for a sphere of radius a, should the curvature G be 1/(a^2) instead of a^2?
Yes, it seems that it is a misprint.
 
martinbn said:
Yes, it seems that it is a misprint.
Thanks. Since we are on this book, I have another question: on page 306, lines 9 and 11 from the top, should B(t,r) and A(t,r) have square roots on them?
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vaatmoly said:
Thanks. Since we are on this book, I have another question: on page 306, lines 9 and 11 from the top, should B(t,r) and A(t,r) have square roots on them?
I believe so, yes. :smile:
 

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