SDiv's user avatar
SDiv's user avatar
SDiv's user avatar
SDiv
  • Member for 9 years, 11 months
  • Last seen more than a month ago
150 votes
7 answers
8k views

Apparently sometimes $1/2 < 1/4$?

14 votes
1 answer
1k views

Show the equivalence of two infinite series over Bessel functions

12 votes
2 answers
12k views

Fourier transform of the error function, erf (x)

11 votes
2 answers
8k views

Rotating vector functions

6 votes
1 answer
91 views

double area integrals over coherence functions on circles

6 votes
2 answers
208 views

Integral/infinite sum related to Bessels which pop up in optical coherence theory

4 votes
2 answers
135 views

Show that $k^a=\sum_{m=1}^b\left ( c_m^a\prod_{n\neq m} \frac{k-c_n}{c_m-c_n} \right ).$

3 votes
2 answers
79 views

Decomposition of $_1F_2(1+n;1,2+n;x)$

2 votes
0 answers
116 views

Eigensystem of a real symmetric Toeplitz matrix of large order

2 votes
1 answer
3k views

The relationship between diagonal entries and eigenvalues of a diagonalizable matrix

2 votes
0 answers
190 views

FM signals and non-trivial solutions to a homogeneous Fredholm integral equation of the first kind

1 vote
0 answers
677 views

Integral equation involving magnitude/modulus squared

1 vote
1 answer
336 views

Maximizing a particular integral / functional

1 vote
1 answer
41 views

Prove that scalar functions of vectors cannot be inverted

1 vote
2 answers
93 views

Two partial fraction identities for $\frac{x^n}{x^m+k}$

0 votes
1 answer
32 views

Restrictions on $\mathbf{U}$ in $\mathbf{a}^T \mathbf{U}\mathbf{b}=\mathbf{b}^T\mathbf{U}\mathbf{a}$

0 votes
1 answer
964 views

Unitary matrices and preservation of inner product - necessary and sufficient?

0 votes
1 answer
431 views

Gradient of real part = real part of gradient?

0 votes
2 answers
70 views

A cute little system of nonlinear PDEs