# Teaching at UC Davis, Winter 2020

TEACHER OFFICE HOURS: M 03:05-04:05PM  and  R 01:30-03:00PM

MAT-145 s001, Combinatorics: MWF 1210-0100 PM                                              MAT-145 s002, Combinatorics: MWF 0210-0300 PM

TA: Brett Leroux (leroux AT math.ucdavis.edu)    Office Hours: T 12-1PM,   T 3-4PM   and  W 10AM-12.  Room: 2142 Academic Surge.

TEXTBOOK: Combinatorics and Graph Theory, 2nd Edition by Harris, Hirst and Mossinghoff. Springer. 2008.

SUGGESTED EXERCISES (By section)

• 2.1:  1, 2, 3, 4, 8, 9, 11, 12, 14.
• 2.2:  2, 3, 5, 6, 7, 8, 10, 11.
• Extra: Use induction to prove:   $$(a) \ 11^n-6$$ is divisible by 5, $$\forall n\in\mathbb N$$.        $$(b) \ n^2<2^n,\ \forall n\ge 5$$.
• 2.3:  1, 2, 3, 4, 5, 6, 8, 9, 10.
• 2.4:  1, 2, 3, 5, 6, 7, 8, 9, 10, 13.
• 2.5:  1, 2, 3, 4, 6, 7, 8, 9, 12.
• 2.6.4:  All of them.
• 2.6.?
• Midterm 1 will be based on the Suggested Exercises and Homeworks 1 and 2.
• There will be no classes on Mondays 1/20 and 2/17.

HOMEWORKS: All problems are worth the same, but elegant solutions to Difficulty 3 Problems could provide bonus points for Midterms.

2. To be posted on 01/22, due on 01/29.

OPTIONAL READING: (For examples and exercises)

• Discrete Mathematics: Elementary and Beyond by Lovász, Pelikán, and Vesztergombi. Springer. 2003.

• 5 Homeworks: 10 points each         (due dates: Hw1: 1/22  //  Hw2: 1/29  //  Hw3, Hw4, Hw5: TBA)
• Midterm Exam 1 (Friday, JAN 31, in class): 100 points,
• Midterm Exam 2 (Friday, FEB 28, in class): 100 points,
• Final (s001: Wednesday, March 18 // 1:00-3:00 p.m.//Room: TBA,----- s002: Tuesday, March 17 // 6:00-8:00 p.m.//Room: TBA): 200 points,
• TOTAL: 450 points.

Grading curve: (There could be +s and -s)

• 0-40%: F
• 41-50%: D
• 51-65%: C
• 66-80%: B
• 81-100%: A

All students must present their photo ID during exams. Use of books, notes, calculators, or anything else but pencil and paper, will not be allowed on any exam.

Talking, texting, newspaper reading, etc. disrupt the lectures, use of computers, cellphones, or any other electronic devices for non-academic purposes during lectures is prohibited.

If you have any problem at all that requires special accomodation, please let me know well in advance!

There will be no make-up quizzes nor make-up exams. A missed exam counts as 0 points. If you miss the final you will automatically receive an F. The grade I (Incomplete) will not be given in any circumstances.