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j.c.
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All Questions Answers
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answer
141
Are there examples of non-orientable manifolds in nature?
Nov 12, 2010
question
51
Analogue to covering space for higher homotopy groups?
Oct 17, 2009
answer
43
What is the exterior derivative intuitively?
Apr 11, 2010
answer
34
Examples where physical heuristics led to incorrect answers?
Jul 1, 2010
question
29
Largest hyperbolic disk embeddable in Euclidean 3-space?
Oct 15, 2009
answer
23
Conway's game of life for random initial position
May 31, 2013
answer
20
Is there a mathematical and information theoretic explanation for this cube packing phenomenon?
Dec 16, 2017
answer
18
Perfectly centered break of a perfectly aligned pool ball rack
Feb 7, 2014
answer
18
Link such that deleting any two components leaves an unlink
May 8, 2018
answer
18
Determining homotopy classes [T^2, RP^2]
Oct 24, 2012
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It's been another year...MO exists since six years!
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Examples of mathematical exposition arising from MO answers
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Site updates are live
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How can I see how many people viewed a specific question?
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Apologies re image links update => bumping
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Best books for mathematical background?
43
Why does the sky change color? Why is the sky blue during the day, red during sunrise/set and black during the night?
36
Book about classical mechanics
24
Why is tape so hard to rip when it is not broken, but so easy once there is the tiniest cut in it?
24
What is the difference between a measurement and any other interaction in quantum mechanics?

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