\( \def\bbN{{\mathbb N}} \def\bbQ{{\mathbb Q}} \def\bbR{{\mathbb R}} \def\bbZ{{\mathbb Z}} \def\calA{{\mathcal A}} \def\calD{{\mathcal D}} \def\calT{{\mathcal T}} \def\Lim{{\operatorname{Lim}}} \) © | Dror Bar-Natan: Classes: 2025-26:
Class Photo on January 27

MAT1301S - Algebraic Topology

Toronto, Spring 2026

$$ $Essentials $$


Course Calendar

# Week of ... Things
1 January 5-9 Handout: $$make_page {name => 'About', title => 'About This Class'}$$.
$$framed_page {name => 'BB-0105', title => 'Blackboards for Monday January 5: Course introduction, the fundamental group', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260105-110227'}$$.
$$framed_page {name => 'BB-0106', title => 'Blackboards for Tuesday January 6: $\pi_1(S^1)$', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260106-180333'}$$.
$$framed_page {name => 'HW01', title => 'Homework Assignment 1', external => 0, url => 'https://drorbn.net/AcademicPensieve/Classes/26-1301-AlgebraicTopology/HW01.pdf'}$$.
2 January 12-16 $$framed_page {name => 'BB-0112', title => 'Blackboards for Monday January 12: The fundamental theorem of algebra, categories', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260112-110126'}$$.
$$framed_page {name => 'BB-0113', title => 'Blackboards for Tuesday January 13: Functoriallity, topological applications', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260113-180323'}$$.
$$framed_page {name => 'HW02', title => 'Homework Assignment 2', external => 0, url => 'https://drorbn.net/AcademicPensieve/Classes/26-1301-AlgebraicTopology/HW02.pdf'}$$.
Thursday: Dror's office time is online only, here.
3 January 19-24 Dror was away this week and classes were taught by Alexander Kupers.
$$framed_page {name => 'BB-0119', title => 'Blackboards for Monday January 19: Kupers on Seifert van Kampen', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260119-101603'}$$.
$$framed_page {name => 'BB-0120', title => 'Blackboards for Tuesday January 20: Kupers on Seifert van Kampen II', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260120-161817'}$$.
Thursday: No Dror's office time.
4 January 26-30 Monday: Today's class was online!
$$framed_page {name => 'CoveringSpaces', title => 'Everything You Always Wanted to Know About Covering Spaces', url => 'https://drorbn.net/AcademicPensieve/Classes/26-1301-AlgebraicTopology/CoveringSpaces.pdf'}$$.
$$framed_page {name => 'BB-0126', title => 'Blackboards for Monday January 26: Half class on coverings', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260126-110129'}$$.
$$framed_page {name => 'Vid-0126', title => 'Video for Monday January 26: Half class on coverings', url => 'https://drorbn.net/AcademicPensieve/Classes/26-1301-AlgebraicTopology/Class-260126.mp4'}$$.
$$framed_page {name => 'BB-0127', title => 'Blackboards for Tuesday January 27: Coverings, tilings, categories', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260127-160702'}$$.
Tuesday: We took our Class photo during the break.
5 February 2-6 $$framed_page {name => 'BB-0202', title => 'Blackboards for Monday February 2: G-Sets', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260202-101024'}$$.
$$framed_page {name => 'BB-0203', title => 'Feb 3 H14-15: Proof of the main theorem of covering spaces', url => 'https://drorbn.net/bbs/show?prefix=26-1301#260203-160712'}$$.
Wednesday: Dror's office hours 4:00-5:30pm.
$$framed_page {name => 'HW03', title => 'Homework Assignment 3', external => 0, url => 'https://drorbn.net/AcademicPensieve/Classes/26-1301-AlgebraicTopology/HW03.pdf'}$$.
Thursday: Dror's office hours 4:00-5:30pm.
Thursday: our Term Test will take place at 6-8pm at SS 2105.
6 February 9-13 Tuesday/Wednesday: Homework Assignment 4 will likely be assigned.
R February 16-20 Monday is Family Day, and the week is Reading Week - no classes and no office time.
7 February 23-27 Tuesday/Wednesday: Homework Assignment 5 will likely be assigned.
Friday is the last date for graduate students to drop this class without penalty.
8 March 2-6 Tuesday/Wednesday: Homework Assignment 6 will likely be assigned.
9 March 9-13  
10 March 16-20 Tuesday/Wednesday: Homework Assignment 7 will likely be assigned.
11 March 23-27 Tuesday/Wednesday: Homework Assignment 8 will likely be assigned.
12 March 30 - April 3 Thursday: No office hours this week and beyond.
F April 6-10 I hope that our final examination will be scheduled for sometime this week.

Further resources: