Combinatorial Algebraic Topology: Class Info

Date Material Covered Comments
Sept 04 Informal Intro
Sept 06 1.1 - 1.2
Sept 11 1.2 -1.3 No Homework Due
Sept 13 1.3 -1.4
Sept 18 1.5 - 1.6

Homework for Section 1.2 is due.

김세훈 presents problem 3
Sept 20 1.6 -1.7
Sept 25 Extra Notes Notes

Section 1.4 - 1.5 due.

Sep 27 Extra Notes 윤영준 presents Sect 1.4 problem 3 parts a) and b).
Oct 02 Extra Notes

Oct 04 Some Athletics thing. No Class.
Oct 09 Most of 2.1 이진욱 presents 1.7 #3
Oct 11 2.1 - 2.2
Oct 16 2.2 - 2.3 Homework for Sect 2.1 is due. 이설라 presents 2.1 #4.
In 2.3 we showed equivalence of Borsuk Ulam and Tucker's Lemma.
Oct 18 2.3 Did proof of Tuckers Theorem. Please finish reading the proof: cases 1.2, 2.1, and 2.2 on page 40.
Oct 23 Make up class for Nov 06.
Oct 25 Test Solutions
Oct 30 Started 2.4
Nov 01 No Class
Nov 06 Finished 2.4
Nov 08 No Class
Nov 13 Half of 3.1 권성일 presents 2.4 # 1
Nov 15 Finished 3.1, started 3.2 남상욱 Chap 3.1 # 2
Nov 20 3.2, 3.3 박다윤 Chap 3.1 # 5a,b
Nov 22 3.5 채승우 Chap 3.2 #1
Nov 27 4.1 신현중 Chap 3.3 #2
Nov 29 4.2 현상민 Chap 3.4 # 3
Dec 04 Missed presentations and/or 4.3

If you missed your presentation and still want points, contact me soon.

Dec 06
Dec 13 Final Test on Sections 2.4 - 4.3
Section Homework Comment
1.1 1a
1.2 3

1.3
1.4 1,3
1.5 1
1.7 2,3a For question 3, you will have to use a rigourous geometric definition of the barycentric subdivision. This is hinted at following the abstract definition 1.7.2.
2.1 Any two of: 1,2,4,9,10 Please think about all, but you only have to write up two.
(For #10 you may use #6. Heck, while you're at it, do #6.)
2.4 1
3.1 1,2,4,5
3.2 1
3.3 1,2,3
3.5 2
4.1 2,3,5,6
4.2 1,2,6
4.3 1,2

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Last Modified: Tue 08 Jul 2025 11:44:47 AM KST