This course is a follow-up of "Algorithms and Data Structures". First techniques to compute the complexity of recursive algorithms will be presented, based on recurrences as they can be derived from the algorithms. In particular the Master Theorem will be discussed. Several applications are presented, in particular algorithms for huge matrices and geometric algorithms. The remaining main part of the course is about NP-completeness: investigating a wide range of algorithmic decision problems for which no polynomial algorithms are expected to exist. We give underlying theory and will prove NP-completeness for a wide range of problems, by which they are essentially equivalent. At the end some basics of the next complexity class are presented: PSPACE.
There is a 2hr written exam, which will be on campus (so not online!). Apart from that there will be 2 assignments you can hand in to get a "bonus". So there are two moments in the course when homework exercises may be handed in, as assignment. You are very strongly suggested to do so: these will be graded and commented.
The final grade is the minimum of 10 and f + a/10, where f is your written exam grade and a is your assignment grade.
The course consists of 2 hours lecture (hoorcollege) Monday,
15:45--17:30, plus "self study" and an exercise class
(werkcollege) on Wednesday, 8:30--10:15 or 10:30--12:15,
depending on your exercise group.
NB. The "persoonlijke rooster" page sometimes mentions 15:30
as starting time of the lecture and sometimes 15:45. For clarity, we
will always start at 15:45.
Exceptions to this schedule are:
The recordings of all lectures can be found on brightspace .
Exercises classes are given on-line via discord until 12/5. From 12/5 they are partially live (on campus) and partially on-line. As a student you can choose to attend them live or on-line. Check brightspace and your mail for details.
| Year-week | Lecture | Date lect | Topics | Material | Date ex.class | Exercises |
|---|---|---|---|---|---|---|
| 14 | 1 | 6/4 | General techniques, Fibonacci, depth AVL trees, Divide and conquer, merge sort | Slides lecture 1 (see recording and annotated slides on brightspace ), 19.4 (pp 523-525), first 6.5 pages of lecture notes | 7/4 | Ex. 4.3-3, 4.3-6 (page 87) and extra exercises. To be discussed on 14/4 |
| 15 | 2 | 12/4 | Master Theorem, examples: merge sort, median | Slides lecture 2 (see recording and annotated slides on brightspace ), pages 7-8 of lecture notes, Chapter until 4.5 (page 96), but not 4.2 + pp 220-222 | 14/4 | Ex. 4.4-2, 4.4-3, 4.4-4, 4.4-5 (pp 92-93), 4.5-1, 4.5-3 (pp 96-97). To be discussed on 21/4 |
| 16 | 3 | 19/4 | Karatsuba multiplication, Strassen algorithm, proof sketch Master Theorem, smallest distance in set of points | Slides lecture 3 (see recording and annotated slides on brightspace ), pages 9-10 of lecture notes, Remainder Chapter 4, Chapter 33.4 (pp 1039-1043) | 21/4 | Ex. 4-1, 4-3 (pp 107-108), 4.2-1, 4.2-7 (pp 82-83), 28.2-1 (pp 831), 33.4-3, 33.4-4, 33.4-6 (pp 1044). To be discussed on 28/4 |
| 17 | 4 | 26/4 | P and NP, NP-hard, NP-complete | Slides lecture 4 (see recording and annotated slides on brightspace ), Chapter 34 until Fig 34.6, p. 1070, also see lecture notes | 28/4 | Assignment 1 can be found on brightspace , to be handed in on 10/5, also via brightspace: Deadline: 11:00 AM on 10/5. |
| 19 | 5 | 10/5 | NP-completeness: 3SAT, CNF-SAT, <=3-SAT, ILP, clique, vertex cover, 3-coloring | Slides lecture 5 (see recording and annotated slides on brightspace ), Chapter 34 until page 1092 | 12/5 | Extra exercise and Ex. 34-1 and 34-2 (pp 1101-1102). To be discussed on 19/5 |
| 20 | 6 | 17/5 | Clique-3Cover, Subset sum, TSP, the class PSPACE. | Slides lecture 6 (see recording and annotated slides on brightspace ), Chapter 34 and lecture notes | 19/5 | Extra exercises and Ex. 34.2-1, 34.2-5 (p 1066); 34.3-3, 34.3-6 (p 1077); 34.4-6 (p 1086). To be discussed on 26/5 |
| 21 | No lecture, but there is an exercise class on Wednesday 26/5 | [No lecture this week] | 26/5 | Assignment 2 can be found on brightspace and can be handed in via brightspace, electronically to your TA. Deadline 11:00 AM, 1/6 | ||
| 22 | 7 | 31/5 | Cook-Levin Theorem: Proof that 3-SAT is NP-complete; course overview | Slides lecture 7, (see recording and annotated slides on brightspace ), Chapter 34 until page 1085, also see lecture notes and Wikipedia on the Cook-Levin Theorem | 2/6 | Answers to Assignment 2. |
| 25 | 21/6 | 8:30--10:30, EXAM (in de Vereeniging!) | Old exams (in Dutch) with solutions: June 23, 2015 and June 28, 2016. Note the topics covered are slightly different. An old exam of March 30, 2020, can be found on brightspace, but note that this was an online "open book" exam. | |||
| 28 | 13/7 | 8:30--10:30, resit EXAM (on campus, in HG) |