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XT Chen's user avatar
XT Chen's user avatar
XT Chen
  • Member for 5 years, 11 months
  • Last seen this week
  • Peking University, Haidian, Beijing, China
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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.

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Top posts
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question
27
Why the sphere spectrum is more correct than $\mathbb{Z}$?
Nov 4, 2022
question
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
question
10
Is there a strictly increasing differentiable function maps positively measurable set to zero measure set?
Feb 24, 2020
question
5
How to understand pushout/pullback in a stable $\infty$-category
Oct 6, 2021
question
5
Concrete computation of pullback of the $D$-module $\mathbb{C}[t,t^{-1}]$
Mar 26, 2022
question
4
Question about an inequality described by matrices
Dec 25, 2018
question
4
A contradiction caused by the Kähler identity and the formal adjoint relation
Dec 12, 2020
question
4
Projective objects in the category of simplicial objects in an abelian category
Aug 3, 2021
question
4
Cohomological range of a perverse sheaf
Sep 5
question
3
Definition of 1st degree obstruction class
Apr 27, 2020
Top network posts
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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?
8
$f$ 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 $f(t)\le 1+t$