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Results tagged with reference-request
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user 8528
This tag is used if a reference is needed in a paper or textbook on a specific result.
11
votes
3
answers
5k
views
Total energy of the universe
In popular science books and articles, I keep running into the claim that the total energy of the Universe is zero, "because the positive energy of matter is cancelled out by the negative energy of th …
- 1,101
1
vote
2
answers
11k
views
Borel Sets on $\mathbb{R}^n$ [closed]
Define the Borel sigma-algebra on $\mathbb{R}^n$ as the smallest sigma-algebra containing all $n$-rectangles
$(a_1, b_1) \times \cdots \times (a_n, b_n)$.
Is it true that the Borel sigma algebra cont …
- 1,101