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user26872

  • Reference: Abramowitz and Stegun, DLMF, EoM (random), OEIS
  • Online tools: Wolfram Alpha (examples)
  • LaTeX: cheat sheet, DeTeXify, SE MathJax reference
  • History: Mathematician of the day
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Top Questions
Top Answers
67
The Integral that Stumped Feynman?
math.stackexchange.com

54
Is Biot-Savart law obtained empirically or can it be derived?
physics.stackexchange.com

47
Links between difference and differential equations?
math.stackexchange.com

43
reference for multidimensional gaussian integral
math.stackexchange.com

33
What is the intuition behind the Wirtinger derivatives?
math.stackexchange.com

30
A sine integral $\int_0^{\infty} \left(\frac{\sin x }{x }\right)^n\,\mathrm{d}x$
math.stackexchange.com

26
Evaluating $\lim\limits_{n\to\infty} e^{-n} \sum\limits_{k=0}^{n} \frac{n^k}{k!}$
math.stackexchange.com

22
Evaluating $\int\limits_0^\infty \! \frac{x^{1/n}}{1+x^2} \ \mathrm{d}x$
math.stackexchange.com

19
Entropy of a binomial distribution
math.stackexchange.com

18
Dirac delta in polar coordinates
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16
$\int_{0}^{\infty} \frac{e^{-x} \sin(x)}{x} dx$ Evaluate Integral
math.stackexchange.com

16
Solving $(t^2+1)(y''-2y+1)=e^t$ with the initial conditions: $y(0)=y'(0)=1$
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15
List of interesting integrals for early calculus students
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14
An explanation of spherical harmonics?
math.stackexchange.com

14
How does tilting a bike make it turn sharper?
physics.stackexchange.com

14
How to calculate $I=\frac{1}{2}\int_{0}^{\frac{\pi }{2}}\frac{\ln(\sin y)\ln(\cos y)}{\sin y\cos y}dy$?
math.stackexchange.com

14
Evaluation of $\sum_{x=0}^\infty e^{-x^2}$
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13
Huge buildings affect Earth's rotation?
physics.stackexchange.com

13
Integrate $\int_0^\pi\frac{3\cos x+\sqrt{8+\cos^2 x}}{\sin x}x\ \mathrm dx$
math.stackexchange.com

13
second order ODE via variation of parameters
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12
Proving $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx = \frac{\sqrt \pi}{2}$
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12
What does the symbol $\operatorname{Tr}$ in the Yang-Mills action mean?
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12
Why is a function at sharp point not differentiable?
math.stackexchange.com

11
Higher arcsin wanted
mathoverflow.net

11
Why the magnetic flux is not zero?
physics.stackexchange.com

11
Showing that $f_{2n+1}=f_{n+1}^2+f_n^2$.
math.stackexchange.com

10
The series $ \sum\limits_{k=1}^{\infty} \frac1{\sqrt{{k}{(k^2+1)}}}$
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10
Eigenstates of half Harmonic Oscillator
physics.stackexchange.com

10
Expected value of $\ln X$ if $X$ is $\Gamma(a,b)$ distributed.
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10
How close can $\sum_{k=1}^n \sqrt{k}$ be to an integer?
math.stackexchange.com

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