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Differential Geometry (H)

Fall 2025


Notices

2.

1. Tuesday Lecture room 5507: (14:00-15:35);Thursday Lecture room 5507: (07:50-09:25).


Lectures and excercises

Lecture 1概要:空间的弯曲.

Lecture 2 欧氏空间:向量运算、欧氏变换、向量分析、微分1形式 .

Lecture 3 欧氏空间上的微分形式和外微分运算.

Lecture 4 正则曲线. 平面曲线:密切圆和曲率;Frenet标架和带符号曲率;一般参数计算公式.

Lecture 5 平面曲线曲率的符号;平面曲线基本定理;空间曲线:密切平面与密切圆,Frenet标架和挠率.

Lecture 6 圆柱螺旋线;曲率和挠率的计算公式;挠率的几何意义;刚体运动不改变曲率和挠率.

Lecture 7 空间曲线的基本定理;正则曲面;切平面和法向量;例子.

Lecture 8 参数变换;第一基本形式;高斯曲率及其第一个显式公式.

Lecture 9 高斯曲率和法曲率;欧拉公式;第二基本形式.

Lecture 10 第二基本形式与参数变换;Weingarten变换.

Lecture 11 环面;高斯绝妙定理;平均曲率和极小曲面.

Lecture 12 二次曲面;密切抛物面;椭圆点,双曲点,抛物点,平点;脐点.

Lecture 13 旋转曲面;常高斯曲率旋转曲面;伪球面.

Lecture 14旋转曲面中的极小曲面:悬链面;直纹面:可展面 .

Lecture 15 直纹面中的极小曲面:正螺面;曲面论基本定理引论.

Lecture 16 自然标架运动方程;结构方程。

Lecture 17 曲面论基本定理;正交活动标架引论。

Week 1

Homework 1.

Week 2

Homework 2.

Week 3

Homework 3.

Week 4

Homework 4.

Week 5 Homework 5.

Week 6

Homework 6.

Week 7

Homework 7.

Week 8

Homework 8.

Week 9

Homework 9.


References

1


Tutorials

Tutor

周驰宇


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