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Spring 2010 : MATH681 Introductory Topology

  1. General information
  2. Textbook
  3. Homework and exams
  4. Grading scheme
  5. Course syllabus


General information


Textbook

munkres.jpeg

James R. Munkres "Topology", 2nd edition, Prentice Hall, 2000.


Homework and exams

Homework assignments will be posted here each Wednesday, next to the syllabus. I encourage you to work together on these problems, but please write out your own solutions (due the following Wednesday). There will be two midterms, the first in week five and the second in week ten. These will be take-home exams: I ask that you allow yourself two hours to work on the problems by yourself, without outside assistance. The final will be a three hour exam on Friday 30th April at 8am.


Grading scheme

Course grades will be composed of homework (20%), midterms (20% each), and the final (40%).


Course syllabus

The syllabus below will be updated as the semester progresses.

Week

Material covered (and corresponding sections of Munkres)

Homework

Jan 11-15

Topological spaces, closed sets, bases (12, 13, 17)
Interior, closure, neighbourhoods, limit points, boundary, Hausdorffness (17)
Metric spaces, finer/coarser, continuous/open/closed maps (20, 21, 12, 18)

Homework assignment 1.
Due Wednesday 20th January.
Solutions 1.
Correction to problem 1.

Jan 18-22

Subspaces, homeomorphism, manifolds (16, 18, 36)
Product topology, quotient topology (15, 19, 22)

Homework assignment 2.
Due Wednesday 27th January.
Solutions 2.

Jan 25-29

Adjunction spaces, attaching cells (pg 224, sections 72, 74)
Animation of the Roman surface
Cut-and-paste techniques (74, 76), quotients by group actions
Connectedness (23, 24)

Homework assignment 3.
Due Wednesday 3rd February.
Solutions 3.

Feb 1-5

Path-connectedness and local connectedness (24, 25)
Compactness (26, 27, 28)

Homework assignment 4.
Due Friday 12th February.
Solutions 4.

Feb 8-12

Local compactness (29)
Triangulations of manifolds (78)
Classification of closed surfaces (76, 77)

Midterm 1.
Due Wednesday 17th February.
Midterm 1 solutions.

Feb 15-19

Homotopy and path homotopy (51)
The fundamental group (52)
Retractions (55)
Homotopy equivalence (58)

Homework assignment 5.
Due Wednesday 24th February.
Solutions 5.

Feb 22-26

Covering spaces (53)
Path lifting and the fundamental group of the circle (54)
Brouwer fixed-point theorem (55)
The fundamental group of S^n (59)

Homework assignment 6.
Due Wednesday 3rd March.
Solutions 6.

Mar 1-5

Direct sums, free products, free groups (67, 68, 69)
Seifert-van Kampen theorem (70)
Wedges of circles and adjoining two-cells (71, 72)
Fundamental groups of surfaces (74, 75)

Homework assignment 7.
Due Wednesday 17th March.
Solutions 7.

Mar 8-12

Spring break - no classes


Mar 15-19

Covering spaces and general lifting (54, 79)
The universal covering space (80)
Tessellations of the hyperbolic disc by squares and hexagons
(For the genus two surface we get a tessellation by octagons)

Homework assignment 8.
Due Wednesday 24th March.
Solutions 8.

Mar 22-26

Existence of covering spaces (82)
Covering transformations (81)
Tessellation of S^3 by dodecahedra: one, two, three

Midterm 2.
Due Wednesday 31st March.
Midterm 2 solutions.

Mar 29-Apr 2

DeRham cohomology on R^n

Homework assignment 9.
Due Wednesday 7th April.
Solutions 9.

Apr 5-9
Extra class Fri 10am

DeRham cohomology on manifolds
Poincare Lemma
Mayer-Vietoris sequence

Homework assignment 10.
Due Wednesday 21st April.
Solutions 10.

Apr 12-16

No classes this week


Apr 19-23

Integrating one-forms in R^2
The homotopy axiom
H^1(M) and the fundamental group

Homework assignment 11.
Due Wednesday 28th April.
Solutions 11.

Apr 26-30

DeRham cohomology of surfaces
Final exam 8am Friday 30th



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