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Top Questions
70
votes
Why is the harmonic oscillator so important?
soft-question
harmonic-oscillator
asked Jan 12, 2015 at 17:08
physics.stackexchange.com
40
votes
What's the intuition behind the Choi-Jamiolkowski isomorphism?
quantum-mechanics
quantum-information
entanglement
density-operator
duality
asked Jul 26, 2016 at 14:26
physics.stackexchange.com
32
votes
Probability distribution in the coupon collector's problem
probability
combinatorics
coupon-collector
asked May 2, 2013 at 18:34
math.stackexchange.com
27
votes
"A two-envelopes puzzle"
probability
paradoxes
asked May 15, 2017 at 18:50
math.stackexchange.com
20
votes
Maximum likelihood estimation of $a,b$ for a uniform distribution on $[a,b]$
statistics
uniform-distribution
maximum-likelihood
parameter-estimation
asked Jun 4, 2013 at 16:15
math.stackexchange.com
17
votes
Understanding the Fokker-Planck equation for non-stationary processes
pde
stochastic-processes
asked May 22, 2017 at 21:17
math.stackexchange.com
14
votes
Deriving Maclaurin series for $\frac{\arcsin x}{\sqrt{1-x^2}}$.
sequences-and-series
power-series
asked Nov 2, 2013 at 14:43
math.stackexchange.com
11
votes
Integrating $\int_0^\infty \frac{1-\cos x }{x^2}dx$ via contour integral.
complex-analysis
asked Dec 5, 2013 at 17:41
math.stackexchange.com
11
votes
(Canonical) Partition function - what assumption is at work here?
statistical-mechanics
asked Jun 11, 2013 at 18:32
physics.stackexchange.com
11
votes
Angular momentum for 3D harmonic oscillator in two different bases
quantum-mechanics
homework
angular-momentum
operators
harmonic-oscillator
asked Jun 23, 2014 at 17:08
physics.stackexchange.com
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Top Answers
27
$\cos(x)+\cos(x\sqrt{2})$ is not periodic
math.stackexchange.com
15
Proving $\frac{x}{y} +\frac{y}{z} + \frac{z}{x} \ge 3$ for positive $x,y,z$
math.stackexchange.com
7
Steps to find limit of $\frac1{t\sqrt{t+1}} - \frac1t$ as $t\to0$
math.stackexchange.com
6
Why does this entropy change formula for heating water blow up at $T_{1}=0$?
physics.stackexchange.com