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Muzi
  • Member for 7 years, 5 months
  • Last seen more than a month ago
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question
5
Completeness of the sequence $\left \{ \frac{1}{x+1},\frac{1}{x+2},\frac{1}{x+3}, \dots \right \}$ in $L^2[0,1]$
Jan 1, 2022
question
5
Zeros of functions of the form $F(z) = \int_I g(t-z) f(t) \, dt$ with $g$ entire and $f \in L^1(I)$
Jan 8, 2022
question
5
Does there exist a study of entire functions which satisfy $|F(x+iy)| \leq a e^{-bx^2}e^{cy^2}$?
May 27, 2022
question
3
Completeness of discrete shifts in $\mathbb{R}^n$
Dec 3, 2019
question
3
Weierstrass-type approximation of a system of the form $\{ x \mapsto f(x)^{p_n} : n \in \mathbb N\}$
Jan 5, 2022
question
2
Stability estimates on quotients of the form $ \frac{\prod_{j=1}^n a_j}{\prod_{j=1}^n b_j} $
Mar 12, 2021
question
2
Uniqueness results for holomorphic functions bounded in a strip with a certain decay to zero
Jan 3, 2022
question
2
Properties of infinite matrices of the form $A= \left ( \int_0^1 f(x)(x+k)^n \, dt \right )_{k,n \in \mathbb N_0}$
Jul 29, 2022
question
2
What is the quantity $\sqrt{\frac{c^2+d^2}{a^2+b^2}}$ of a matrix with determinant one?
Sep 18, 2023
question
1
How many Fourier coefficients of a sparse signal $f=\sum_{n=1}^Nc_n\delta_{t_n}$ are needed to determine $f$ uniquely?
Feb 10, 2021
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17
Completeness of $\{ f_n : n \in \mathbb N \} \subset C[0,1]$ in $L^1[0,1]$
13
Does the identity $\cos^2(x)+\sin^2(x)=1$ hold in a unital Banach algebra where $1$ is the unit?
11
(Fundamental) Solution of the Helmholtz equation
8
Is it true that $ S(x)^2 \geq S'(x)\int_{-\infty}^{x}S(t) \, dt$, where $S(x) = A\gamma(x) + \gamma(x-C)$ and $\gamma$ is the standard Gaussian?
6
Does the inclusion $A \subset B$ for closed densely defined operators $A$ and $B$ imply $A=B$?