Mathematics
Landau's user avatar
Landau's user avatar
Landau's user avatar
Landau
  • Member for 4 years
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About

I'm a student at Fudan University. My main interests are analysis and operator theory.

Welcome to my Google personal site :).

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All Questions Answers
Score Newest
answer
13
If $x_n \to 0 \pmod{a}$ for every $a>0$, does it follow that $x_n \to 0$?
Dec 3, 2022
question
9
Asymptotic on $\max\{d(n): 1\leq n\leq N\}$.
Apr 11, 2022
question
8
Unbounded operator such that $P^2=P$
Dec 12, 2019
question
8
The fundamental group of $\mathbb{R}/\mathbb{Q}$
Mar 16, 2020
question
7
Asymptotic on $\sum_{n<x} 1/d_{\alpha}(n)$, $d_\alpha$ is the general divisor function.
Apr 11
question
6
Convergence between $\sum |a_n|$ and $\sum a_n z^n$ for all $z\in\mathbb{T}$
Mar 30, 2021
question
6
Show $T$ is compact operator if $\langle Te_n,e_n \rangle$ tend to zero.
Jan 27, 2021
question
5
Holomorphic n-th covering map between annulus must be $z^n$, essentially.
Jun 12, 2021
answer
5
Let $A, B, M ∈ M_n(C)$ such that $AM = MB$ . If $M ≠0$, Show that $A$ and $B$ must have at least one eigenvalue in common.
Oct 22, 2022
answer
5
Show that $(Y,||\cdot||_Y)$ is a Banach space
Mar 10, 2022

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