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question
103
Which is stronger, a rope without knots or a rope with knots?
Sep 6, 2016
question
46
What role does "spontaneous symmetry breaking" play in the "Higgs Mechanism"?
Jun 20, 2015
question
44
Where does deleted information go?
May 1, 2014
answer
36
What is canonical momentum?
Nov 6, 2014
question
27
Why the statement "there exist at least one bound state for negative/attractive potential" doesn't hold for 3D case?
Oct 29, 2014
answer
26
What role does "spontaneous symmetry breaking" play in the "Higgs Mechanism"?
Jun 22, 2015
question
17
How to obtain the explicit form of Green's function of the Klein-Gordon equation?
Sep 12, 2016
answer
17
Why don't free electrons fall from metals if shaken?
Oct 17, 2014
question
13
How is Meissner effect explained by BCS theory?
Sep 11, 2014
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12
Floquet quasienergy spectrum, continuous or discrete?
Oct 5, 2014
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asyncio.sleep() vs time.sleep()
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double click to open an ipython notebook
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What's the consequences if I don't install the "standard system utilities" of Debian?
30
Should I cite an article that I can't find?