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xslittlegrass
  • Member for 11 years, 7 months
  • Last seen more than 3 years ago
13 votes
0 answers
1k views

How to solve a time-dependent Schrodinger equation in periodic Dirac delta potential

6 votes
0 answers
1k views

Is there a way to Fourier transform $\cos\left(\sin (x)\right)$?

3 votes
1 answer
719 views

Why a periodic function can be expressed by a set of finite numbers -- question about Fourier transform?

3 votes
1 answer
250 views

How to understand the mapping between a periodic function to its Fourier coefficients?

2 votes
0 answers
76 views

Fourier transform of $e^{-\delta (x)} \cos\left(\frac{1}{x}\right)$

2 votes
0 answers
256 views

summation of reciprocal of factorial and square root

2 votes
2 answers
2k views

How to find the asymptotic behavior of this function

2 votes
0 answers
172 views

How to solve two-level Schrödinger equation using Floquet theorem?

2 votes
0 answers
226 views

Is the one-dimensional time-independent Schrödinger equation solvable in potential (1+Tanh(x+1))(-1+Tanh(x-1))

2 votes
1 answer
82 views

How can I solve this equation if I know the solution for a similar equation

2 votes
1 answer
3k views

What is the relationship between hypergeometric function and Legendre polynomials?

1 vote
0 answers
253 views

How to find the Frobenius series solution of $\cos x~y''+xy'+by=0$?

1 vote
1 answer
106 views

how to do the integral $\int_0^{2 \pi } \frac{e^{e^{-i \theta }}}{e^{4 i \theta }} \, d\theta$

1 vote
0 answers
394 views

Is the Riemann surface plot in Wolfram Alpha wrong?

1 vote
0 answers
55 views

How to find the non singular condition for this equation

0 votes
1 answer
63 views

Limit of Mathieu function near the discontinuous point

0 votes
1 answer
160 views

Mathieu function rescale problem

0 votes
3 answers
107 views

Is there a formula to calculate the coefficients of $\prod_{i=1}^N(x+x_i)$