Xuande Liu

A dull man interested in useless mathematics.

我是刘炫德,纽约大学石溪分校数学系 数学系研究生

目前对双有理几何比较感兴趣,除此之外最近在尝试学习infinity categories

但是由于本人天赋平庸,所以见识浅薄

个人邮箱: liuxuande@pku.edu.cn

以下是我在学习过程中记下的一些笔记

I am Xuande Liu, a graduate student in Mathematic department, StonyBrook University.

I take interests in birational geometry. Besides, I am learning infinity categories recently.

Due to my limited intelligence, I know very little about mathematics.

Email: liuxuande@pku.edu.cn

Here are some short notes.


午夜杂谈一篇

700万香港人,即使是根据大陆媒体的估计,也至少有20万人参加了抗议。香港人有的同意抗议,有的支持警察,媒体上报道、大家反复争执的点反而从表达政治诉求的五条变成了到底是警察还是抗议人群导致的暴力升级。然而问题不在于警察,也不在于一两个暴民,而在于香港自从1997年以来积累了两代人的弊病,这一代人在记事之后再未受过英国人的统治,也从不曾经历或者根据口口相传感受过文革或者八平方这样的事件。然而为...

Quasi-Affine Schemes and Quasi-Affine Morphisms.

This is a short notes on the quasi-affine schemes and quasi-affine morphisms. PDF downloads: Quasi-Affine Schemes and Quasi-Affine Morphisms

Normal Rings

This is a short notes on the normal rings. PDF downloads: Normal Rings

Scheme Theoretic Notions

A short notes on some scheme theoretic notions. PDF downloads: Scheme Theoretic Notions