confusedTurtle's user avatar
confusedTurtle's user avatar
confusedTurtle's user avatar
confusedTurtle
  • Member for 2 years
  • Last seen this week
8 votes
3 answers
552 views

How can tempered distributions be identified with functions?

2 votes
2 answers
259 views

Solving $-u''+u=\delta'(x-1)$ using the Fourier transform

1 vote
1 answer
786 views

A primitive root modulo p is a primitive root modulo $p^2$ if and only if $g^{p-1} \not\equiv 1 \mod{p^2}$

1 vote
1 answer
142 views

$ax+by=c$ has unique solution for positive integers

1 vote
2 answers
49 views

Defining a measure $\mu$ by the function $d\mu$

1 vote
1 answer
109 views

Why is this assumption necessary on the proof of duality of $H^1$ and BMO? (Stein)

1 vote
0 answers
60 views

Monotonicity of average in the border for sub/superharmonic functions, for non-euclidean balls

1 vote
0 answers
43 views

Can a sequence of series converge to 0 if all the terms in each of the sequences are atrictly positive?

1 vote
0 answers
39 views

Convergence of $\sum_{n=1}^{\infty}f_n$ given convergence of $\sum_{n=1}^{\infty}\lVert f_n \rVert_1$

1 vote
2 answers
59 views

If $E(Y)=0$, $Cov(Y, E(Y|X))\geq0$ for any random variable $X$

1 vote
0 answers
50 views

Equality holds in Donoho-Stark iff $f$ is the characteristic function of the translate of a subgroup (finite abelian group)

0 votes
0 answers
37 views

No Riemann-integrable function has the harmonic series has Fourier coefficients

0 votes
1 answer
66 views

Are these probabilities orthogonal?

0 votes
1 answer
268 views

Expressing a constant function in terms of a Fourier sine series (for initiaal boundary problem in wave equation)

0 votes
1 answer
69 views

Differetiating function obtained through superposition of Green's function

0 votes
0 answers
24 views

Integrating scalar field over $p$-norm balls and/or their surface

0 votes
1 answer
40 views

The derivative with respect to $\theta$ of the image of exponential of circle parametrization on the tangent space is a Jacobi field

0 votes
1 answer
84 views

Correspondent subfield of a subgroup of the Galois group

0 votes
0 answers
52 views

Does an integrable, monotone decreasing function $f$ in $[0, \infty)$ satisfy $\lim\limits_{x \to \infty}xf(x)=0$? [duplicate]

0 votes
1 answer
156 views

Splitting field of a degree 3 polynomial is generated by a root and the square root of the discriminant

0 votes
0 answers
42 views

Show there is a tower of cyclic field extensions of prime degree from $\mathbb{Q}(\sqrt[12]{5})$ to $\mathbb{Q}$

0 votes
1 answer
44 views

Probability of population $k$ at time $n$ in a Galton-Watson process

0 votes
0 answers
62 views

The doubling constant in a metric measure space is 1 iff $|X|$=1

0 votes
1 answer
122 views

Find all primes $p$ such that $ 3x^2-1\equiv 0 \mod{p}$ has a solution