Math 421 Q1 Winter 2017


Instructor / Office / Phone # Xinwei Yu / 527 CAB / (780)4925731
Email ;  Webpage xinwei2@ualberta.ca ;  http://www.math.ualberta.ca/~xinweiyu
Location / Time  CAB 243/MWF 1--1:50.
Office Hours (Updated Mar. 6, 2017) M 2--3:30, W 2--5; Or by appointment

 

Important Dates:
Course Syllabus

Course Material

Week
Dates
Lecture Notes
Homeworks
Due on Thursdays at 12p
in Assignment Box
1
Jan. 9--13
Jan. 9: Introduction
Jan. 11: Product and Sum Rules
Jan. 13: Permutations and Combinations
Homework 1 (Due Jan. 19)
Solutions
2
Jan. 16--20
Jan. 16: Integer Solutions; (Mistake corrected Jan. 18)
Jan. 18: Integer Solutions;
Jan. 20: Occupancy Problem I
Homework 2 (Due Jan. 26)
Solutions
3
Jan. 23--27
Jan. 23: Occupancy Problem II;
Jan. 25: Occupancy Problem III:
Jan. 27: Coloring Problem.
Homework 3 (Due Feb. 9)
Solutions
4
Jan. 30--Feb. 3
Jan. 30: Review I;
Feb. 1: Review II;
Feb. 3: Midterm 1 (Solutions)
Midterm 1: Average 22.5, Median 24
5
Feb. 6--Feb. 10
Feb. 6: Review of Midterm; Generating functions: Introduction
Feb. 8: Generating functions: Power series, partial fractions
Feb. 10: Generating functions I
Homework 4 (Due Feb. 16)
Solutions
6
Feb. 13--Feb. 17
Feb. 13: Generating functions II
Feb. 15: Recurrence relations I
Feb. 17: Recurrence relations II
Homework 5 (Due Mar. 2)
Solutions
Reading week

7
Feb. 27--Mar. 3
Feb. 27: Coloring with symmetry: examples
Mar. 1: Groups; Group actions; Burnside's Lemma
Mar. 3: Counting through Burnside's Lemma
Homework 6 (Due Mar. 9)
Solutions
8
Mar. 6--10
Mar. 6: The permutation group; Polya's theory
Mar. 8: Polya counting
Mar. 10: Review and more examples (Mistake corrected Mar. 10)
Homework 7 (Due Mar. 23)
Solutions
9
Mar. 13--17
Mar. 13: Review: Generating functions and recurrence relations
Mar. 15: Review: Polya counting
Mar. 17: Midterm 2 (Solutions)

10
Mar. 20--24
Mar. 20: Review of Midterm 2; Introduction to graph theory
Mar. 22: Basics of graphs
Mar. 24: Coloring of graphs
Homework 8 (Due Mar. 30)
Solutions
11
Mar. 27--31
Mar. 27: Chromatic polynomials
Mar. 29: The 5-color theorem
Mar. 31: Review of Graph Theory and More examples
Homework 9 (Due Apr. 6)
Solutions
12
Apr. 3--7
Apr. 3: Block Design
Apr. 5: Latin Squares
Apr. 7: Review of the Semester

13
Apr. 10--12
Apr. 10: Final Review I
Apr. 12: Final Review II