Messages

16/1: The exam and partial solutions.

16/1: The grading is done. A: 14, B: 12, C: 7, D: 9, E: 10 and F: too many.

Some comments:

• 2a. Many people have difficulty finding inverses of points!
• 2b. Several people take 396 mod 173, which is very wrong.
• 3a. Most of you forget that for functions on finite sets, it is sufficient to prove either injective or surjective, you don't need both. Not wrong, but tsk, tsk.
• 4a. A lot of people forget to explain how to recover the ballots. The answer is that we can solve the d.log.problem, since the number of ballots will be small.

5/12: Visiting hours before the exam will be Thursday 12/12 at 1315 in EL1 and Monday 16/12 at 1315 in EL1.

11/11: There will be no exercise class on Friday 15/11.

24/10: The lecture notes have finally been updated.

2/9: We have new rooms on Mondays, but unfortunately we will not have the same room every Monday. Monday 2/9 will be in EL1. The schedule lists rooms for each Monday.

5/8: The first lecture will be Monday August 26. There will be no lectures in Week 34.

5/8: The lecture on Monday August 26 will be in R5, not S21. The later Monday lectures will be in S21.

5/8: As there will be no lectures in week 34, use this week to review a few topics that you will need:

• How to compute the greatest common divisor and modular inverses.
• Cyclic groups.
• Linear algebra algorithms. In particular, given a set of vectors that are linearly dependent, how to find a linear combination of those vectors that sum to zero. Does anything change if you are doing linear algebra over finite fields?