Differential Geometry Reading Group (was 16899 B - Special Topics)


Instructor:  

Howie Choset

choset@cs.cmu.edu

268-2495


Time: Thursday 1:00-2:00     

Location: Smith Hall 100
 


To be added to the mailing list, email Amir Degani: degani A@T cmu.edu or Alberto Rodriguez: albertor A@T cmu.edu


Syllabus:

Graphs and Level sets

Vector fields and Tangent spaces

Surfaces and Vector Fields on Surfaces

Orientation Guass map, and Goedesics

Parallel transport, Weingarten map, Curvature of plane curves,

Arc lengths and line integrals, Curvature of surfaces

Convex surfaces

Parameterized surfaces, Local equivalence of surfaces and parameterized surfaces

Surface area and volume

Exponential map, Surfaces with boundary, Gauss-Bonnet Theorem,

Rigid motions and congruence, Isometries, Riemannian metrics


Prerequisites:

Basic Calculus, Some background in Real Analysis, Set Theory, and Linear Algebra


Textbooks:

Elementary Topics in Differential Geometry

J.A. Thorpe

Springer Verlag New York ( ISBN 0-387-90357-7)

 

Differential Geometry of Curves and Surfaces

Manfredo P. do Carmo

Prentice-Hall ( ISBN 0-13-212589-7)


Notes:

Notation Sheet  (Compiled by Elie Shammas and Jiyeong Lee) :PS

 

Detailed Glossary (Compiled by David Conner) : PS

 



Course outline and homework:
 

Elementary Topics in Differential Geometry ( Thorpe )
 

 
Spring 07 Fall 07, Spring 08
Week 0 (January 17): Introduction 
    
Reading for Week 1 : 1-6
       
Homework Assigned: 2.4, 2.5, 2.7, 2.12, 3.4, 4.12, 4.14, 
5.5, 5.7, 6.4, 6.9
 
  
Week 1 (January 24): Introduction: Level Sets 
through Gauss Map 
    
Chapters Discussed on Week 1 : 1-3
       
Homework Problems Discussed in the class : 2.4, 2.5, 2.7, 2.12, 3.4  
 
Reading for Week 2: Chap. 7
 
HW Problems for Week 2 : 7.7, 7.9
 
Week 2 (January 31): Geodesics 
    
Chapters Discussed on Week 2:  4-7
    
Homework Problems Discussed in the class : 4.12, 4.14, 5.5, 
5.7, 6.4, 6.9
 
Reading for Week 3: Chapters 7 and 8
             
HW Problems for Week 3 : 7.7, 7.9, 8.2, 8.4, 8.7 
 
    
Week 3 (Feb 7): Homework Problems from 
Chapters 4-7.
 
Chapters Discussed on Week 3: 4-7
 
Homework Problems Discussed in the class :  7.7, 7.9 
 
Reading for Week 4: Chapters 8,9 and 10
 
 
Homework Assignments for Week 4: 8.2, 8.4, 8.7, 9.2, 9.6, 9.12, 9.15
 
 
Week 4 (Feb 14):  Parallel Transport 
and Wiengarten Map
    
Chapters Discussed on Week 4:  Parallel Transport 
and Wiengarten Map (Chapter 8 and 9)
 
Homework Problems Discussed in the class : 
Proof (Alberto), 8.2 (Ross K.) ,
8.4 (Ross H.), 8.7 (Amir), 9.2, 9.6, 9.12, 9.15
 
Reading for Week 5: Chapters 9 and 10 
   
Week 5 (Feb 21): Wiengarten Map
          
Chapters Discussed on Week 5: Weingarten Map ( Chapter 9)
 
Homework Problems Discussed in the class : 9.2, 9.6, 9.12, 9.15
 
Reading for Week 6:  Chapters 10, 11, and 12.
 
Homework Assignments for Week 6:  10.7, 11.11, 11.16, 11.17, 12.1, 
12.4, 12.13, 12.14 
 
Typos in Thorpe: 11.17.  The end of the second line should
read "\phi_u : [a,b] \rightarrow R^2-{0}"
 
 
Week 6a (Feb 28) and Week 6b(March 13): 
Curvature of Plane curves, Arc 
length and Line Integrals.
 
Chapters Discussed on Week 6: Curvature of Plane Curves, Arc 
Length and Line Integrals( Chapter 10 and 11)
 
Homework Problems Discussed in the class :  10.7, 11.11, 11.16, 11.17
 
Reading  Assignment for Week 7:   Chapters 12 and 13.
 
Homework Assignments for Week 7:   12.1, 12.4, 12.13, 12.14 
 
 
Week 7(March 20,21): Curvature of Surfaces
 
Chapters Discussed on Week 7: Curvature of Surfaces( Chapter 12)
 
Homework Problems  discussed in the class :  12.1, 12.4, 12.13, 12.14 
 
Reading  Assignment for Week 8: Chapters 13, 14 
 
Homework Assignments for Week 8: 13.5
 
   
Week 8 (March 28): Curvature of Surfaces, 
Convex Surfaces 
 
Chapters Discussed on Week 8: Curvature of Surfaces, 
Convex Surfaces (Chapter 13)
 
Homework Problems Discussed : 12.14, 13.5
 
Reading  Assignment for Week 9:  Chapter 14.
 
Homework Assignments for Week 9: 14.7, 14.13, 14.14, 14.16 
 
 
Week 9 (April 4):  Convex Surfaces, 
Parameterized Surfaces.
 
Chapters Discussed on Week 9 : Convex  Surfaces, 
Parameterized Surfaces (Chapters 13 and 14)
 
Homework Problems Discussed in the class: --
 
Reading  Assignment for Week 10:  Chapter 15.
 
Homework Assignments for Week 10: 15.2, 15.7, 15.9, 15.13
 
 
Week 10 (April 11):  Clarification of 
doubts from previous chapters,
Local Equivalence of Surfaces 
and Parameterized Surfaces (beginning).
 
Chapters Discussed on Week 10: Doubts from Chapters 12,
 13 and 14. Beginning of Chapter 15. Local
Equivalence of Surfaces and Parameterized 
Surfaces and (Chapter 15).
 
Homework Problems Discussed in the class: 12.13 (redo), 
14.7, 14.13, 14.16
 
Reading Assignment for Week 10: Chapter 15 -- 
Local Equivalence of Surfaces 
and Parameterized Surfaces.
 
Homework Assignments for Week 11:  15.2, 15.7, 15.9, 15.13
 
 
Week 11(April 18): Local Equivalence of 
Surfaces and Parameterized Surfaces.
 
Chapters discussed on Week 11 : Local Equivalence of Surfaces 
and Parameterized Surfaces (Chapter 15)
 
Homework Problems discussed in the class  : 14.14
    
Reading Assignment for Week 12:  Chapter 15
 
Homework Assignments for Week 12:  --
 
 
Week 12(April 25): Local Equivalence 
of Surfaces and Parameterized Surfaces.
 
Chapters discussed on Week 12 : Local Equivalence 
of Surfaces and Parameterized Surfaces (Chapter 15)
 
Homework Problems discussed in the class  : 15.2, 15.7, 15.9, 15.13
    
Reading Assignment for Week 13:  Surface Area and Volume (Chapter 17). 
 
Homework Assignments for Week 13:  17.6, 17.9, 17.13, 17.18
 
 
Week 13(May 25): Surface Area and Volume.
 
Chapters to be discussed on Week 13: Surface Area and Volume 
(Chapter 17).
 
Homework Problems discussed in the class  : 17.6, 17.9
 
Reading Assignment for Week 14:  Minimal Surfaces (skipped), 
The Exponential Map.
 
Homework Assignments for Week 13b+14: 17.10, 17.13, 
17.18, 19.2, 19.3, 19.5, 19.6
 
 
Week 13b: Surface Area and Volume.
 
Chapters to be discussed on Week 13: Surface Area 
and Volume (Chapter 17).
 
Homework Problems discussed in the class: 17.10, 17.13, 17.18
 
Reading Assignment for Week 14:  Minimal Surfaces (skipped), 
The Exponential Map.
 
Homework Assignments for Week 14:   19.2, 19.3, 19.5, 19.6
 
  
Week 14: The Exponential Map.
 
Chapters to be discussed on Week 14:  The Exponential Map (Chapter 19)
 
Homework Problems discussed in the class  :---
 
Reading Assignment for Week 15:  Surfaces with boundary.
 
Homework Assignments for Week 15:   20.2, 20.5, 20.9, 20.10
 
 
Week 15: The Exponential Map (discussion), 
Problems from Chapters 17 and 19.
 
Chapters discussed on Week 15:  The Exponential Map (Chapter 19).
 
Homework Problems to be discussed in the class  : 19.2, 19.3.
 
Reading Assignment for Week 16:  Surfaces with boundary 
(brief discussion).
 
Homework Assignments for Week 16:   20.2, 20.5, 20.9, 20.10
 
Week 16: Surfaces with Boundary
 
Chapters discussed on Week 16:  Surfaces with Boundary.
 
 
 
Week 17: Surfaces with Boundary
 
Chapters discussed on Week 17:  Surfaces with Boundary.
 
Homework Problems  discussed in the class  : 20.2, 20.5, 20.9, 20.10
 
Reading Assignment for Week 18:  The Gauss-bonnet Theorem.
 
Homework Assignments for Week 18:   21.1, 21.2, 21.4, 21.5
 
 
Week 0 (September 12): Introduction: Level 
Sets through Vector Fields
    
Chapters Discussed on Week 1 : 1-5
       
Homework Problems Discussed in the class : -  
 
Reading for next week: Chaps.1-7 
 
HW Problems for Next Week : Uma 2.5, Matt 2.7 a,b ,Sidd 3.4,Uma 4.12,
Matt 5.7, Sidd 6.4, Uma 6.9, Matt 7.7, Sidd 7.9
 
Week 1 (Sep 19) NSH 4201: Level Sets through 
Geodesics
    
Chapters Discussed this Week : 1-7
       
Homework Problems Discussed in the class : Uma 2.5, Matt 2.7 a,b,
Sidd 3.4,Uma 4.12, Matt 5.7, Sidd 6.4, Uma 6.9, Matt 7.7, Sidd 7.9
 
Reading for week 2: Chaps. 8-10 
 
HW Problems for next week: Sidd 7.9 (from last week) and 8.2, 
Matt 8.4, Uma 8.7, Sidd 9.2, Matt 9.6, Uma 9.12, Sidd 9.15, Matt 10.7
 
 
Week 2 (Sep 26) NSH 4201: Finish Geodesics, 
Parallel Transport, Weingarten Map, and Curvature 
of Plane Curves
    
Chapters Discussed on Week 2:  8-10
    
Homework Problems Discussed in the class : Sidd 7.9 (from last week) 
and 8.2, Matt 8.4, Uma 8.7, Sidd 9.2, Matt 9.6, Uma 9.12, Sidd 9.15, 
Matt 10.7
 
Reading for Week 3: Chapters 11-13
             
HW Problems for next week :11.11, 11.16, 11.17, 12.1, 12.4, 
12.13, 12.14, 13.5 
 
 
Week 3-5 (Oct) Smith 100: Arc length 
and line integrals, Curvature of surfaces, 
Convex surfaces
    
Chapters Discussed on Weeks 3-5:  11-13
    
Homework Problems Discussed in the class : 11.11, 11.16, 11.17, 
12.1, 12.4, 12.13, 12.14, 13.5 
 
Reading for next week: Chapters 14
             
HW Problems for next week :14.7, 14.13, 14.14, 14.16
 
 
Week 6 (Nov 14) Parametrized Surfaces 
    
Chapters Discussed on Weeks 6:  14
    
Homework Problems Discussed in the class : 14.7, 14.13, 14.14
 
Reading for next meeting (11/28): Chapters 15
             
HW Problems for next week :15.2 Matt, 15.7 Sidd, 15.9 Matt, 
15.13 Sidd
 
Week 7 (Nov 28): Local Equivalence 
of Surfaces and Parameterized Surfaces.
 
Chapters discussed this week : Local Equivalence 
of Surfaces and Parameterized Surfaces (Chapter 15)
 
Homework problems discussed in class  : 15.2, 15.7, 15.9, 
part of 15.13
    
Reading assignment for next week:  Surface Area and Volume 
(Chapter 17). 
 
Homework assignments for next week:  15.13 Sidd, 17.6 Sidd, 
17.9 Matt, 17.13 Sidd, 17.18 Matt
 
Week 8,9 (Dec): Surface Area and Volume 
 
Chapters discussed this week : Surface Area and Volume (Chapter 17)
 
Homework problems discussed in class : 17.6 Sidd, 17.9 Matt, 
17.13 Sidd - only a, 17.18 Matt - only first part
    
Reading assignment for next week:   
 
Homework assignments for next meeting: 17.13b Sidd, 
17.18 second part Matt

-----------Spring 2008-------------

 

Week 1 (Jan 24): The Exponential Map
 
Chapters discussed this week : The Exponential Map (Chapter 19)
 
Homework problems discussed in class : 17.13b Sidd, 
17.18 second part Matt, 
    
Reading assignment for next week: Surfaces with boundary (Chap 20)  
 
Homework assignments for next meeting: 19.2 (Amir), 19.3(Ross),
19.5 (Alberto), 19.6 (Matt)
 
 
Week 2 (Jan 31, Feb 14): The Exponential Map
 
Chapters discussed this week : The Exponential Map (Chapter 19)
 
Homework problems discussed in class : 19.2 (Amir), 19.3(Ross),
19.5 (Alberto), 19.6 (Matt)
    
Reading assignment for next week: Surfaces with boundary (Chap 20)  
 
Homework assignments for next meeting: 20.2, 20.5, 20.9, 20.10
 
 
Week 3 (Feb 21): Surfaces with boundary
 
Chapters discussed this week : Surfaces with boundary (Chapter 20)
 
Homework problems discussed in class : 
    
Reading assignment for next week:   
 
Homework assignments for next meeting: 

 

 

 
 
Week 18 : The Gauss Bonnet Theorem
 
Chapters to be discussed on Week 18: The Gauss Bonnet Theorem.
 
Homework Problems to be discussed in the class  : 21.1, 21.2, 21.4, 21.5
 
Reading Assignment for Week 19:  The Gauss-Bonnet Theorem, Rigid Motions and Congruence.
 
Homework Assignments for Week 19: ---
 
 
 
          
     
 
Week 16: Rigid Motions and Congruence and Isometries
Chapters : 22-23
homework: 22.6, 22.7, 23.3
 
Week 17: Riemannian Metrics
Chapters: 24
homework: 24.1, 24.2, 24.3, 24.4, 24.6
 

 


Notes on the Internet

     Notes on Differential Geometry by B. Csikós

    Last five Lectures on Curves from: http://www.cs.iastate.edu/~cs577/handouts.html

 

Links

ˇ                http://archives.math.utk.edu/topics/differentialGeom.html


Webpage updated Jan, 2008 by Amir Degani  (degani a@t cmu edu)