DISCRETE STRUCTURES II
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Tentative Lecture Schedule.
Week 1.
Tuesday January 8th. Stable Marriages.
Related Reading.
Some Slides on Stable Matchings by Kevin Wayne.
Thursday January 10th. Matchings; Augmenting Paths; Hall's Theorem.
Related Reading.
For notes on matchings in bipartite graphs, see Diestel's book (Section 2.1).
Friday January 11th. (Confirmed) Tutorial: Review of basic graph concepts. (Burnside Hall Room 1205: 3:30-5:30PM)
Related Reading.
For basic definitions in graph theory, see Diestel's book (Chapter 1).
Week 2.
Tuesday January 15th. Applications of Hall's theorem: Latin Squares; Regular graphs; Systems of Distinct Representatives.
Related Reading.
For an alternative proof of the latin squares, see Biggs (Section 17.3).
For notes on SDRs, see Van Lint and Wilson (Chapter 5).
Thursday January 17th. Konig-Egervary Theorem, Vertex Cover and applications. [Assignment 1 assigned.]
Related Reading.
For notes on the Konig-Egervary Theorem, see Van Lint and Wilson (Chapter 5).
For an alternative proof of the vertex cover theorem, see see Diestel's book (Section 2.1).
Week 3.
Tuesday January 22nd. Edge colouring: scheduling; Clos networks.
Related Reading.
For notes on edge colouring, see Biggs (Section 17.2) or Diestel's book (Section 5.3).
Here are some Benes networks.
You may be interested to peak at this research paper on the use of online edge colouring in packet switch scheduling.
Take a look at these too: slides.
Thursday January 24th. Matching Markets.
Related Reading.
Some notes on matching markets by D. Easley and J. Kleinberg.
Week 4.
Tuesday January 29th. Planar graphs: Euler's Formula.
Related Reading.
See Matousek and Nesetril (Chapter 5).
Thursday January 31st. Basics of convex polytopes; Platonic Solids; the Art Gallery theorem.
[Assignment 1 due on MyCourses 7PM.] [Assignment 2 assigned on Friday Feb. 1.]
Related Reading.
For notes on regular polytopes (Platonic solids) see Matousek and Nesetril.
For notes on the art gallery theorem, see Aigner and Ziegler (Chapter 26).
Week 5.
Tuesday February 5th. Pick's Theorem (lattice points and areas); Planar duality; 4, 5 and 6-Colour Theorems.
Related Reading.
For notes on Pick's Theorem, see Aigner and Ziegler.
[For a deeper discussion on planar duality, see Diestel's book (Section 4.6).]
For notes on colouring planar graphs, see Matousek and Nesetril (Section 5.4) or Diestel's book (Section 5.1).
Thursday February 7th. Graph Connectivity (Definitions only): Graph Minors; Kuratowski's theorem.
Related Reading.
For notes on graph minors, see Diestel's book (Section 1.7).
For notes on Kuratowski's theorem, see Diestel's book (Section 4.4).
Friday February 8th. (Confirmed) Review/ Q+A Session. (Burside Hall Room 1205: 3:30-5:00PM)
Week 6.
Tuesday February 12th.
Planar graphs: Fary's theorem; intersection and contact graphs; Thurston's Theorem; interval graphs.
Related Reading.
A summary of Fary's theorem (including proof) here.
The research paper on straight-line embeddings with integer lengths is here
The research paper on Fary-embeddings into small-sized grids is here.
Some notes on interval graphs.
Wednesday February 13th. [Assignment 2 due on MyCourses.]
Thursday February 14th. Midterm Exam.
Week 7.
Tuesday February 19th. Menger's Theorem.
For (three) proofs of Menger's Theorem, see Diestel's book (Section 3.3).
Thursday February 21.
Flows on the Internet.
Week 8.
Tuesday February 26th. Discrete probability: quiz and introduction.
Related Reading.
See Rosen (Sections 5.1 and 5.2) for an introduction to discrete probability.
Tuesday February 28th. Conditional probability: Bayes Theorem and applications; Independence. [Assignment 3 assigned.]
Related Reading.
For more on Bayes Theorem see....
Conditional probability and independence are covered in Rosen (Section 5.2).
Notes on natural sampling
Week 9.
Spring Break - No Lectures.
Week 10.
Tuesday March 12th. The Monty Hall problem; Discrete random variables and expectations.
Related Reading.
For more on the Monty Hall problem see ..... Rosen (Section 5.1).
Random variables and expectation are covered in Rosen (Sections 5.2 and 5.3).
Thursday March 14th. The Secretary problem; the Birthday problem.
Related Reading.
An article on the secretary problem by Arnab Chakraborty.
The birthday problem is discussed in Rosen (Section 5.2).
Week 10.
Tuesday March 19th. Randomised Quicksort.; Hashing; Balls and Bins.
Related Reading.
Our proof for Randomised Quicksort can be found in Matousek and Nesetril (Section 9.4).
Some notes on hashing and balls and bins by Moses Charikar.
Thursday March 21st. Random Walks; web search engines. The Chernoff Bound. [Assignment 3 due.] [Assignment 4 assigned.]
Related Reading.
Some notes on pagerank (Section 9.2) by A.Meyer.
Week 11.
Tuesday March 26th. Applications of the Chernoff Bound: Balls and Bins; Statistical Trials; Quicksort.
Thursday March 28th. Independent mortgages: the housing crash.
Related Reading.
Some notes on the housing crash (Section 19.5.3) by T. Leighton.
Friday March 23rd. Tutorial: Review of basic combinatorics. (Burnside Hall Room 1205, 330-530 PM)
Related Reading.
For an introduction to combinatorics, see Biggs (Sections 11.1-11.5) or Rosen (Sections 4.1-4.5).
Week 12.
Tuesday April 2nd. Bijections: labelled spanning trees; the Catalan numbers.
Related Reading.
For numerous proofs for the spanning tree problem see Aigner and Ziegler (Chapter 22), Van Lint and Wilson (Chapter 2), or Matousek and Nesetril (Chapter 7).
The Catalan numbers are .....
Thursday April 4th. The Generating Function Method: the Tower of Hanoi; the Fibonnaci numbers. [Assignment 4 due.] [Assignment 5 assigned.]
Related Reading.
See Herb Wilf's book Generatingfunctionology (Sections 1.1-1.3).
[General readings on generating functions can also be found in Rosen (Section 6.4) and Matousek and Nesetril (Sections 10.1-10.4).]
Week 13.
Tuesday April 9th. Compositions and Convolutions: fruit, money.
Related Reading.
For more on Compositions see...
Thursday April 11th. Operations on Ordinary Generating Functions: Sum of Squares; the Catalan Numbers. [Assignment 6 posted - (Exercise sheet. not for marks).][Assignment 5 due.]
Week 15.
No activities April 15-19.
Week 16
Question and Answer Session. Monday, April 22nd. TBA.
Final Exam. Tuesday, April 23rd. 6-9PM.