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Top Questions
66
votes
Is there a slowest rate of divergence of a series?
sequences-and-series
asymptotics
divergent-series
asked Jul 25, 2013 at 16:43
math.stackexchange.com
50
votes
What's the proof that the Euler totient function is multiplicative?
elementary-number-theory
proof-strategy
totient-function
multiplicative-function
asked Sep 7, 2012 at 17:39
math.stackexchange.com
39
votes
Intuition behind normal subgroups
group-theory
intuition
normal-subgroups
asked Apr 30, 2014 at 18:52
math.stackexchange.com
26
votes
Why does $\arctan(x)= \frac{1}{2i}\log \left( \frac{x-i}{x+i}\right)+k$?
integration
asked Jun 7, 2013 at 21:55
math.stackexchange.com
23
votes
A rope attaches the Moon to the Earth. What happens?
newtonian-mechanics
rotational-dynamics
asked Jul 5, 2013 at 21:18
physics.stackexchange.com
22
votes
Constrained variational problems intuition
intuition
calculus-of-variations
lagrange-multiplier
asked Jan 15, 2013 at 20:23
math.stackexchange.com
20
votes
Is it possible to compute the colour of *any* molecule?
computational-chemistry
quantum-mechanics
asked Feb 19, 2013 at 19:00
chemistry.stackexchange.com
17
votes
How much effect does the Bernoulli effect have on lift?
fluid-dynamics
aerodynamics
bernoulli-equation
aircraft
lift
asked Jan 17, 2013 at 22:28
physics.stackexchange.com
16
votes
Is the meander ratio of a river $= \pi$?
fluid-dynamics
everyday-life
asked May 23, 2013 at 11:20
physics.stackexchange.com
14
votes
How is Gauss' Law (integral form) arrived at from Coulomb's Law, and how is the differential form arrived at from that?
electromagnetism
electrostatics
gauss-law
coulombs-law
distributions
asked Sep 26, 2012 at 17:36
physics.stackexchange.com
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Top Answers
189
Best Fake Proofs? (A M.SE April Fools Day collection)
math.stackexchange.com
14
Closed form for $ \int_0^\infty {\frac{{{x^n}}}{{1 + {x^m}}}dx }$
math.stackexchange.com
13
Integrality of $\frac{n}{3} + \frac{n^2}{2} + \frac{n^3}{6}$
math.stackexchange.com
7
Evaluating $\frac{d^2y}{dx^2}$
math.stackexchange.com
6
Linear independence of $\sin(x)$ and $\cos(x)$
math.stackexchange.com
6
Variance of n Bernoulli Trials
math.stackexchange.com
5
How to prove :$\lim_{n\to+\infty}\left(\dfrac{u_{n+1}}{u_1.u_2...u_n}\right)^2=2011$
math.stackexchange.com
5
Integrate $\int_{0}^{\pi}{\frac{x\cos{x}}{1+\sin^{2}{x}}dx}$
math.stackexchange.com
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