User Jon

19 votes

Accepted

Generalizing the trick for integrating $\int_{-\infty}^\infty e^{-x^2}\mathrm dx$?

answered Feb 3, 2012 at 10:02

10 votes

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Finding the power series for $y$ where $y + \sin(y) = x$

answered Apr 23, 2012 at 13:50

10 votes

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Applications of information geometry to the natural sciences

answered May 15, 2013 at 7:18

9 votes

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Chaos and ergodicity in hamiltonian systems

answered Dec 7, 2011 at 21:17

8 votes

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Stochastic interpretation of Einstein equations

answered Dec 6, 2011 at 21:19

8 votes

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how calculate integral $\int \dot{x} \; dx$

answered Feb 1, 2012 at 17:48

7 votes

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Trace of a differential operator

answered May 24, 2013 at 14:58

6 votes

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Why does $\int_{-\pi}^{\pi}\sin(nx)e^{inx}$=$-\pi i$?

answered Feb 5, 2012 at 20:46

5 votes

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Solving $-\chi''(\epsilon)+\Big[\epsilon^2+\frac{2F}{hw}\sqrt{\frac{h}{hw}}\epsilon \Big]\chi(\epsilon)=\mu\chi(\epsilon)$

answered Feb 12, 2012 at 15:51

5 votes

$y''\pm e^ty=0 \implies \mid \cup x_i \mid =? s.t. y(x_i)=0 $

answered Feb 28, 2013 at 11:40

5 votes

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Finding sum $\frac{1}{2} x^2 + \frac{1}{2} \frac{1}{3} x^3 + \frac{1}{4} \frac{1}{3} x^4 + ... $

answered Apr 7, 2017 at 13:06

5 votes

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Find eigenvalues of $x^2 \frac{d^2\phi}{dx^2} + x \frac{d\phi}{dx} + \lambda \phi = 0$ with boundary conditions $\phi(1) = \phi(b) = 0$

answered Oct 30, 2019 at 7:05

4 votes

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How to prove that the sequence $a_n = (1/n)^{1/n}$ converges?

answered Nov 12, 2018 at 13:18

4 votes

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Can't understand a simple wave equation matlab code

answered Feb 11, 2012 at 12:03

4 votes

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Calculate perimeter from parametric form with an ellipse?

answered Feb 12, 2012 at 14:54

4 votes

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Integral two solutions

answered Feb 26, 2012 at 11:18

4 votes

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Derivation in simple harmonic motion

answered Feb 27, 2012 at 8:09

3 votes

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Dilogarithm asymptotics for an exponential parameter.

answered Mar 16, 2012 at 11:32

3 votes

Laplace of $x^2\frac{d^2y}{dx^2}$

answered Feb 7, 2012 at 15:06

3 votes

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Rittner equation

answered Feb 8, 2012 at 13:26

3 votes

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Sum of power series

answered Feb 14, 2012 at 8:15

3 votes

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Projection of Gaussian in Spherical Coordinates

answered Feb 25, 2012 at 14:13

3 votes

Book recommendations from basic algebra to precalculus?

answered Apr 27, 2012 at 8:46

3 votes

Solving non homogeneous differential equation

answered May 20, 2012 at 14:13

3 votes

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How to solve quadratic over square root of quartic equals constant?

answered Feb 2, 2012 at 11:16

3 votes

Series with increasing factor inside the summation

answered Feb 3, 2012 at 19:34

3 votes

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how could i prove this (delta function representation)

answered Feb 4, 2012 at 12:14

3 votes

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Is there an analytical solution to this nonlinear ODE?

answered Dec 8, 2011 at 13:40

3 votes

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Characteristics of a PDE

answered Jan 14, 2012 at 17:24

3 votes

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Simultaneous Differential Equations

answered Feb 24, 2012 at 9:59

Stack Exchange Network

177 Answers

Generalizing the trick for integrating $\int_{-\infty}^\infty e^{-x^2}\mathrm dx$?

Finding the power series for $y$ where $y + \sin(y) = x$

Applications of information geometry to the natural sciences

Chaos and ergodicity in hamiltonian systems

Stochastic interpretation of Einstein equations

how calculate integral $\int \dot{x} \; dx$

Trace of a differential operator

Why does $\int_{-\pi}^{\pi}\sin(nx)e^{inx}$=$-\pi i$?

Solving $-\chi''(\epsilon)+\Big[\epsilon^2+\frac{2F}{hw}\sqrt{\frac{h}{hw}}\epsilon \Big]\chi(\epsilon)=\mu\chi(\epsilon)$

$y''\pm e^ty=0 \implies \mid \cup x_i \mid =? s.t. y(x_i)=0 $

Finding sum $\frac{1}{2} x^2 + \frac{1}{2} \frac{1}{3} x^3 + \frac{1}{4} \frac{1}{3} x^4 + ... $

Find eigenvalues of $x^2 \frac{d^2\phi}{dx^2} + x \frac{d\phi}{dx} + \lambda \phi = 0$ with boundary conditions $\phi(1) = \phi(b) = 0$

How to prove that the sequence $a_n = (1/n)^{1/n}$ converges?

Can't understand a simple wave equation matlab code

Calculate perimeter from parametric form with an ellipse?

Integral two solutions

Derivation in simple harmonic motion

Dilogarithm asymptotics for an exponential parameter.

Laplace of $x^2\frac{d^2y}{dx^2}$

Rittner equation

Sum of power series

Projection of Gaussian in Spherical Coordinates

Book recommendations from basic algebra to precalculus?

Solving non homogeneous differential equation

How to solve quadratic over square root of quartic equals constant?

Series with increasing factor inside the summation

how could i prove this (delta function representation)

Is there an analytical solution to this nonlinear ODE?

Characteristics of a PDE

Simultaneous Differential Equations