学部・大学院区分
Undergraduate / Graduate
多・博前
時間割コード
Registration Code
3212208
科目区分
Course Category
B類(講究)
Category B
科目名 【日本語】
Course Title
幾何学講究4
科目名 【英語】
Course Title
Seminar on Geometry 4
コースナンバリングコード
Course Numbering Code
担当教員 【日本語】
Instructor
HESSELHOLT LARS ○
担当教員 【英語】
Instructor
HESSELHOLT LARS ○
単位数
Credits
4
開講期・開講時間帯
Term / Day / Period
秋集中 その他 その他
Intensive(Fall) Other Other
授業形態
Course style

学科・専攻
Department / Program
多元数理科学研究科
必修・選択
Required / Selected


授業の目的 【日本語】
Goals of the Course(JPN)
The aim of the course is to study the "Condensed Mathematics" developed by Dustin Clausen and Peter Scholze, following the notes from Scholze's course 2019 course in Bonn.
授業の目的 【英語】
Goals of the Course
到達目標 【日本語】
Objectives of the Course(JPN))
cholze became an instant mathematical superstar with his 2011 thesis that introduced "Perfectoid Spaces." His theory has vastly expanded the reach of geometrical and analytical methods in p-adic geometry. Condensed mathematics holds the promise of accomplishing the same in a broader framework that, in addition to p-adic geometry, includes complex geometry and analysis. Such a unification is entirely new and may well supply the geometrical underpinning to make it possible to attack some of the most important conjectures in mathematics. The goal of the course is to study this new framework, as it is being developed.
到達目標 【英語】
Objectives of the Course
授業の内容や構成
Course Content / Plan
In many situations, topology and algebra do not interact well. For example, the category of topological abelian groups is not an abelian category. To wit, the identity map from the real numbers with the discrete topology to the real numbers with the usual topology does not have a kernel or a cokernel. Condensed mathematics is a replacement of the notion of a topological space that, on the one hand, does not loose any information, and, on the other hand, interacts as well with algebra as one could possibly hope. By definition, a condensed set is a sheaf of sets on the category of profinite sets with finite mutually surjective families of maps as coverings. A topological space X gives rise to a condensed set that to a profinite set S assigns the set of continuous maps from S to X. However, there are many more condensed sets, including the "missing" kernel and cokernel of the map above. Moreover, condensed sets form a topos, so condensed sets behave just like sets, except that the axiom of choice does not hold in general. So we can define condensed abelian groups, condensed rings, etc. as usual. The category of condensed abelian groups is an abelian category, so there are no problems doing homological algebra therein. In fact, among abelian categories, the category of condensed abelian groups is particularly easy to work with, since it has enough compact projective generators.
履修条件
Course Prerequisites
Some knowledge of homological algebra is necessary, and knowledge of some algebraic topology and algebra geometry would be helpful.
関連する科目
Related Courses
Introduction to algebra.
成績評価の方法と基準
Course Evaluation Method and Criteria
Based on presentations.
教科書・テキスト
Textbook
https://www.math.uni-bonn.de/people/scholze/Condensed.pdf
参考書
Reference Book
Clausen and Scholze gave twenty lectures about condensed mathematics at an online masterclass organized by the University of Copenhagen in November 2020. The lectures are available at

https://www.youtube.com/playlist?list=PLAMniZX5MiiLXPrD4mpZ-O9oiwhev-5Uq

and notes from the lectures are available at

https://www.math.ku.dk/english/calendar/events/condensed-mathematics
課外学習等(授業時間外学習の指示)
Study Load(Self-directed Learning Outside Course Hours)
注意事項
Notice for Students
I am only present in Nagoya during the Spring Semester, so the lectures in the Fall Semester will have to given via Zoom.
他学科聴講の可否
Propriety of Other department student's attendance
他学科聴講の条件
Conditions of Other department student's attendance
This is possible.
レベル
Level
3
キーワード
Keyword
Condensed mathematics, analytic geometry, six-functor formalism.
履修の際のアドバイス
Advice
Some familiarity with Lurie's theory of infinity-categories is helpful, but not essential.
授業開講形態等
Lecture format, etc.
遠隔授業(オンデマンド型)で行う場合の追加措置
Additional measures for remote class (on-demand class)