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Willie Wong's user avatar
Willie Wong's user avatar
Willie Wong's user avatar
Willie Wong
  • Member for 13 years, 9 months
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34
What is known about the topological structure of spacetime?
Dec 13, 2010
answer
32
What is the logarithm of a kilometer? Is it a dimensionless number?
Aug 2, 2011
answer
32
Mathematically-oriented Treatment of General Relativity
Sep 23, 2011
answer
31
Can a black hole be formed by electromagnetic radiation?
Aug 28, 2011
answer
22
Importance of Killing vector fields
Oct 15, 2012
answer
20
How is it possible for astronomers to see something 13B light years away?
Jul 2, 2011
answer
19
Why do objects follow geodesics in spacetime?
Apr 25, 2012
answer
16
Nature of spacetime 4-vector and tangent space?
Jun 17, 2011
answer
15
Orientability of spacetime
Aug 31, 2011
answer
14
Why is an Aircraft Runway NOT like a Teaspoon?
Jul 12, 2012
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Is a shopping advice request off-topic in any case?
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How can I find recent changes, or what does active mean?
4
Posting an answer after a question is closed and migrated?
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621
Is there a bijection of $\mathbb{R}^n$ with itself such that the forward map is connected but the inverse is not?
271
Open problems in General Relativity
170
What's the best way to write e-mail addresses?
155
Does there exist a bijection of $\mathbb{R}^n$ to itself such that the forward map is connected but the inverse is not?
143
Mathematical precise definition of a PDE being elliptic, parabolic or hyperbolic