Skip to main content
MathOverflow
XT Chen's user avatar
XT Chen's user avatar
XT Chen's user avatar
XT Chen
  • Member for 6 years, 4 months
  • Last seen more than a month ago
  • Peking University, Haidian, Beijing, China
Profile Activity
Stats
1,208
reputation
13k
reached
3
answers
23
questions
Communities
About

Currently an undergraduate in PKU. Interested in algebraic geometry.

I am devoted to introducing methods from algebraic topology into algebraic geometry. Topics like derived geometry, motivic homotopy and algebraic K-theory are what I am interested in.

Badges
View all badges
This user doesn’t have any gold badges yet.
8
silver badges
15
bronze badges
Top tags
View all tags
2
Score
16
Posts
62
Posts %
1
Score
4
Posts
15
Posts %
1
Score
2
Posts
8
Posts %
1
Score
2
Posts
8
Posts %
0
Score
5
Posts
19
Posts %
0
Score
2
Posts
8
Posts %
Top posts
View all questions and answers
29
Why the sphere spectrum is more correct than $\mathbb{Z}$?
Nov 4, 2022
13
Seek for a algebro-geometric proof: the group homomorphism $\mathrm{SL}(2,\mathbb{Z}) \rightarrow \mathrm{SL}(2,\mathbb{Z}/N\mathbb{Z})$ is surjective
May 12, 2021
11
Is there a strictly increasing differentiable function maps positively measurable set to zero measure set?
Feb 24, 2020
6
How to understand pushout/pullback in a stable $\infty$-category
Oct 6, 2021
5
Concrete computation of pullback of the $D$-module $\mathbb{C}[t,t^{-1}]$
Mar 26, 2022
4
Question about an inequality described by matrices
Dec 25, 2018
4
A contradiction caused by the Kähler identity and the formal adjoint relation
Dec 12, 2020
4
Projective objects in the category of simplicial objects in an abelian category
Aug 3, 2021
4
Cohomological range of a perverse sheaf
Sep 5, 2024
3
Definition of 1st degree obstruction class
Apr 27, 2020
Top network posts
View all network posts
17
Calculating the exponential of an upper triangular matrix
9
How to prove the existence and uniqueness of the solution of a second order linear ODE?
9
$f$ is monotonically increasing, $0 \le f \le 1$ and $\int_0^1 (f(x) - x) dx = 0$ then $\int_0^1|f(x)-x|dx \le \frac{1}{2}$.
7
An example that Čech cohomology is not equal to derived cohomology with on an affine scheme with Zariski topology.
6
If $f^2(t) \le 1+2\int_0^tf(s)\mathrm{d}s$ prove $f(t)\le 1+t$