386 Combinatorics - Fall 2019

Instructor: Benjamin Schroeter

Lecture: Monday 12:00 - 1:00 CW 325
Tuesday 11:40 - 1:05 OR 100D
Wednesday 12:00 - 1:00 CW 325
Friday 12:00 - 1:00 CW 325
Office hours: Wendnesday 10:45 - 11:45 WH 209
Thursday 11:00 - 12:00 WH 209

Contents

This course will focus on enumerative combinatorics and might include basics of algebra, analysis and polyhedral geometry. Basic knowlege in clalculus, linear algebra and writing proofs is assumed.

Text

Mainly we will follow Principles and techniques in combinatorics by Chen Chuan-Chong and Koh Khee-Meng.
More about the topics can be found in:
Enumerative Combinatorics, Vol. 1 and Vol. 2. by Richard Stanley,
Catalan Numbers by Richard Stanley,
Triangulations -- Structures for Algorithms and Applications by Jesús De Loera, Jörg Rambau and Francisco Santos.

Additional Material

There are weekly research talks in the Combinatorics Seminar, and many talks on the AMS Eastern Sectional Meeting (Oct. 12-13) at Binghamton University. I recommend to visit some talks this semester.

Syllabus

You can find the syllabus here.
The first test takes place on Friday, September 25, in CW 325. The second test takes place on Friday, November 1, in CW 325.
The final exam takes place on Thursday 8am, December 12, in LH 3.

Schedule

Week 1 21 Aug. -- 23 Aug. Introduction and Motivation
Week 2 26 Aug. -- 30 Aug. Permutations [Sec. 1.1-1.3]
Week 3 03 Sep. -- 06 Sep. Combinations and Stirling numbers of the first kind [Sec. 1.4]
Week 4 09 Sep. -- 13 Sep. Stirling numbers of the first kind, HW1, injections and bijections [Sec. 1.4-1.5]
Week 5 16 Sep. -- 20 Sep. The Injection and Bijection Principle, Repetition and Multisets [Sec. 1.5-1.6]
Week 6 23 Sep. -- 27 Sep. Review and Exam
Week 7 30 Sep. -- 04 Oct. More about Binomial Coefficients and Practice
Week 8 07 Oct. -- 11 Oct. Binomial Coefficients, Lattice Paths in a Rectangular Grid and Multinomial Coefficients [Ch. 2]
Week 9 14 Oct. -- 18 Oct. The Pigeonhole Principle [Sec. 3.1-3.3]
Week 10 21 Oct. -- 25 Oct. Complete Graphs and Ramsey Numbers [Sec. 3.4-3.5]
Week 11 28 Oct. -- 01 Nov. Practice, Review and Exam
Week 12 04 Nov. -- 08 Nov. A Brief Introduction of Inclusion-Exclusion [Sec. 4.1-4.3, 4.5]
Week 13 11 Nov. -- 15 Nov. Generating Functions [Ch. 5]
Week 14 18 Nov. -- 22 Nov. Recurrence Relations, and Jordan Normal Forms
Week 15 25 Oct. -- 27 Nov. Solving (inhomogeneous) Linear Recurrence Relations
Week 16 02 Dec. -- 04 Dec. Snow and Review

Homework

Homework Set 1,
Homework Set 2,
Homework Set 3,
Homework Set 4,
Homework Set 5,