course description and syllabus
Moodle
(see course description above for the enrolment key)
lecture notes
The actual notes for this course begin with Chapter 27, on page 175.
This file will be updated at least once a week during the semester;
the current version contains everything up to the lecture from 29.10.2024 (chain homotopy and
simplicial approximation).
You may want to press the reload button
to make sure you are seeing the current version.
What appears before Chapter 27 is a complete set of notes that
I wrote for Topology I in a previous semester; this is
convenient to have there so that I can occasionally refer to it in the current course.
If you did not take my Topology I course, you will likely find that most of what is
there nonetheless corresponds closely to
something that you have seen in your previous topology course.
Announcements
 8.10.2024: The problem class (Übung) will not meet in the
first week of the semester.
 6.10.2023: Timesensitive announcements for this course will generally be posted
on the Moodle (see link above) so that they are also emailed automatically to all
students. Please register for the Moodle if you are attending the course.
If you do not have a HU computer account, you can still register for the HU Moodle
with an external email address by following this link
and then clicking on "Create new account".
Problem sets
Weekly problem sets will be posted in this spot on Tuesday or
Wednesday of each week, and discussed in the Übung the
following week. Problems marked with a star(*) should be considered
essential to the continuity of the course.
 Problem Set 1 (to be discussed 23.10.2024):
Exercises 27.3, 27.4, 27.7, 27.8, 28.1(*), 28.2,
28.5(*) and 28.6(*) in the lecture notes
 Problem Set 2 (to be discussed 30.10.2024):
Exercises 28.8(*), 29.2(*) and 29.3 in the lecture notes
 Problem Set 3 (to be discussed 6.11.2024):
Exercises 29.4, 30.1 and 30.2 in the lecture notes, plus this extra problem
on long exact sequences
 Problem Set 4 (to be discussed 13.11.2024)
Useful links

Somebody miscalculated the fundamental group.
(Hermannplatz, 8.06.2017)
