Differential Geometry II Spring 2024

Lecturer
Peter Hintz
Coordinator
Matilde Gianocca
Lectures
Mo 14:15-16:00, HG G5
Do 10:15-12:00, CAB G11

Content

This is a continuation course of Differential Geometry I. Topics covered include:
Introduction to Riemannian geometry: Riemannian manifolds, Levi-Civita connection, geodesics, Hopf-Rinow Theorem, curvature, second fundamental form, Riemannian submersions and coverings, Hadamard-Cartan Theorem, triangle and volume comparison.

Lecture Notes

Handwritten notes from the lectures are available here.

Lectures

Week Date Topics
1 19.02 Introduction, Riemannian metrics
22.02 vector and tensor bundles (1.3)
2 26.02. length and volumes (2.1, 2.2), connections on vector bundles (3: intro)
29.02. Levi-Civita connection, vector fields along maps (3.1)
3 04.03 parallel transport (3.2), first variation of length (3.3), geodesics (beginning of 4)
07.03. Gauss lemma, local length minimization of geodesics (4.1)
4 11.03 Hopf-Rinow theorem (4.2)
14.03. Riemann curvature tensor(5.1)
5 18.03 Sectional curvature (5.2), Contractions (5.3)
21.03. Contractions (5.3, continued), operations on tensors II (5.4)
6 25.03 Second Bianchi identity and applications (5.4)
28.03. Curvature of submanifolds (5.5), second variation of length (6.1)
7 8.04 Jacobi fields (6.1)
11.04 Conjugate points (6.1), second variation of length (6.2)
8 18.04 Synge's Theorem (6.3), space forms (beginning of 7)
9 22.04 Covering maps (7.1)
25.04 End of covering maps (7.1), Proof of Killing-Hopf Theorem (7.2,7.3)
10 29.04 Cartan-Hadamard manifolds (8)
02.05 Cartan-Hadamard manifolds (8), continued
11 06.05 Differential forms (9.1 and 9.2)
12 13.05 Exterior derivative and orientation (9.3 and 9.4)
16.05 Stokes' theorem and orientation (9.4 and 9.5)
13 20.05 Cohomology, Meyer-Vietoris sequence (9.6)
23.05 Convex neighbourhoods (9.7)
14 27.05 Poincaré duality (9.8)
30.05 review

Exercises

Every week a new exercise sheet will be uploaded. You will can submit your solutions using the SAM Up Tool here. (Can only be done when connected to the ETH-network).

The first exercise classes will take place in the second week, on Fr 01.03.

exercise sheet due by solutions
Sheet 1 March 1 Solution 1
Sheet 2 March 8 Solution 2
Sheet 3 March 15 Solution 3
Sheet 4 March 22 Solution 4
Sheet 5 March 29 Solution 5
Sheet 6 April 12 Solution 6
Sheet 7 April 19 Solution 7
Sheet 8 April 26 Solution 8
Sheet 9 May 3 Solution 9
Sheet 10 May 10 Solution 10
Sheet 11 May 17 Solution 11
Sheet 12 May 24 Solution 12
Sheet 13 May 31 Solution 13

Exercise classes

timeroomassistant
Fr 10-11HG D 5.2Enric Florit-Simon and Gerard Orriols
Fr 11-12HG D 5.2office hour

Literature