Teacher: Gabriel Zalamansky, office 238, mail address: click here
Teaching assistant: Stefan van der Lugt, office 227a, mail address: click here
Lectures: 11:15  13:00 on Monday from 6 February to 22 May. There will be no lecture on 13 March, 3 April, 17 April.
Grading: there will be three homework assignments, and an (oral/written) exam at the end of the course.
Lecture 1 

Lecture 2  
Lecture 3 

Lecture 4 

Lecture 5 

Lecture 6 

Lecture 7 

Lecture 8 

Lecture 9 

Lecture 10 

Lecture 11 

On the webpage of the previous edition of this course you'll find lots of exercises to practice with. The following exercises are also nice to look at.
Practice sheet  Remarks/Errata 
Practice sheet 1 
Students are encouraged to work on solving the homework problems together, but everybody has to write down the solutions individually. Copying another student's solutions is not acceptable and may result in a lower grade.
Homework has to be handed in on the Monday of the next lecture, either in class or in the mailbox of Stefan van der Lugt found in the common room at the second floor of the Snellius building. It is also possible to mail the homework, but please send your homework to Stefan's address found at the beginning of this page. If you send the homework by mail please send a (single) PDF file typeset in LaTeX. Scans will not be accepted. If you decide to hand in handwritten homework then make sure everything is legible; if it takes too long to decypher your handwriting your homework will not be graded. LaTeX is always fine!
Homework that is handed in too late will not be graded.
The exercises will be made available at least a week before the deadline.
Homework  Deadline  Remarks/Errata 
Homework 1  27 February  In exercise 3a, the definition of the points \(p,q,r\) is wrong. It should say that \(q\in M\setminus i_1(\mathbb{B}')\) and \(r\in N\setminus i_2(\mathbb{B}')\) are points that are identified by the relation \(\mathcal{R}\) and map to the same point \(p\) under the quotient map. 
Homework 2  10 April  In exercise 1(ii) you should assume that \(G'\) is connected! 
Homework 3  22 May 29 May  A Galois covering is the same as a normal (or regular) covering. In 2.3, depending on the construction of the functors in 2.1 and 2.2, the diagram need not commute. The two functors obtained by composing the functors in the diagram need not be equal. Instead, prove that these functions are isomorphic, that is: show that there exists a natural isomorphism from one functor to the other. 