Fall 2022

Class Time and Place: TuTh 3:00-4:20 pm in Light Engineerin 102. Instructor: Prof. Alan Tucker
Office Hours: ALL OFFICE HOURS ON ZOOM (see Zoom Meetings on Blackboard): Wed 10am - noon Tu Th noon-1:30 pm, and Friday 3-4 pm and by apppointment
How to reach me: email:
Course Texts:Introduction to Graph Theory, Fifth Edition, by R. Wilson, customized for Stony Brook (for students with Wilson's 4th edition, see conversion of HW problems), and
Applied Combinatorics, Sixth Edition, by A.Tucker, John Wiley & Sons.
Tests: one quiz 20 pts, two mid-terms of 75 and 55, and take-home project of 40 pts. Raw total score is sum of tests and project plus HW score (described below). Total score curved as described at bottom of this webpage.
Homework: Assigned weekly or bi-weekly and submitted through Blackboard. The 7 HWs have a total score of 42 pts, most are worth 5 pts. The lowest score will be dropped and the remaining total multiplied by 1/2, for a max of 18 pts, towards the total course score. HWs that are up to one week late will be accepted with a 1 pt penalty.
Solutions to all problems available before tests.
Weekly Assignments Listed Below.

Course Graders Office hours will be in AMS Harriman help room., grade HW with last names A-H; office hours: Monday, Fri 12:30-1:30 pm., grades last name J-R; office hours: Mon,Wed 9:15-10:15am (Zoom only), grades last name S-Z; office hours: Mon, Wed 2-3pm

Americans with Disabilities Act: If you have a physical, psychological, medical or learning disability that may impact your course work, please contact Student Accessibility Support Center, ECC(Educational Communications Center) Building, Room 128, (631)632-6748. They will determine with you what accommodations, if any, are necessary and appropriate. All information and documentation is confidential.

Academic Integrity: Each student must pursue his or her academic goals honestly and be personally accountable for all submitted work. Representing another person's work as your own is always wrong. Faculty is required to report any suspected instances of academic dishonesty to the Academic Judiciary. Faculty in the Health Sciences Center (School of Health Technology & Management, Nursing, Social Welfare, Dental Medicine) and School of Medicine are required to follow their school-specific procedures. For more comprehensive information on academic integrity, including categories of academic dishonesty please refer to the academic judiciary website at

Critical Incident Management: Stony Brook University expects students to respect the rights, privileges, and property of other people. Faculty are required to report to the Office of University Community Standards any disruptive behavior that interrupts their ability to teach, compromises the safety of the learning environment, or inhibits students' ability to learn.

Learning outcomes for AMS 303
1.) Develop skill with proofs in graph theory (this is the only Applied Math course that teaches proofs), including:
        * the careful use of definitions and stated conditions, and their consequences;
        * direct arguments;
        * indirect arguments, i.e., proof by contradiction;
        * proof with generalized figures.

2.) Examine graph theory topics in greater depth (than AMS 301) with a focus on studying and extending theoretical results:
        * general graph properties;
        * planar graphs;
        * graph coloring, including edge and face coloring.

3.) Understand the theory behind Polyas Enumeration Formula and use this understanding in applied problem-solving.

4.) Develop the network algorithms for:
        * maximal minimal flows;
        * maximal matching; 
        * the transportation problem.

5.) Understand the set-theoretic constructions underlying the theory of progressively finite games and apply this knowledge to develop winning strategies for such games:
        * kernel of a game;
        * level-by-level construction;
        * Grundy functions;
        * direct sums of games, including Nim.
6.) Use combinatorial reasoning to efficiently solve cryptograms based on keyword transpose encodings; extend this reasoning to solve polyalphabetic codes.

 See  Corrections of 6th edition of Applied Combinatorics for errors
Week 1-2:Aug 23- Aug 30:Applied Combinatorics Chapter 9, sect 1,2,3,4ug 23-Aug 30
 Lecture Notes for Chap. 9 (Applied Combinatorics)
Homework 1 (due 9/1):Applied Combinatorics 9.1: 5c,10bc; 9.2: 3,4,10; 9.3: 4ac,5de,7de; 9.4: 2bcd,3 (write the whole polynomial out term-by-term), 7de, 9ab
Week 2-4 -- Sep 1 - 13: A.C. Chapter 4
 Lecture Notes for Chap. 4 (Applied Combinatorics)
Homework 2 (due 9/15):4.1: 4,(delete 'total' in line 2),9; 4.2:2,5; 4.3: 2ab,3,6,8,9,12,21; 4.4: 2,4,5,8; 4.5:4a,6a
Week 5 -- Sep 15-20:Chapter 10
 Lecture Notes for Chap. 10(Applied Combinatorics)
 Homework 3 (due9/22):10.1: 1ab,3,8ab,12a,15; 10.2: 1abc,2abc,3ab,4ab, 6ab
Week 6 -- Sep 22- 27: Review and 1st Test (test on Sep 27th) 
 Past First Tests and Solutions
Past First Tests without Solutions
 Solutions to Homeworks 1,2,3 

The course now switches to Wilson's Introduction to Graph Theory (5th edition).

Week 7-- Sep 29-Oct 4: Intro to Graph Theory, Chapt 1&2 (skip sect 1.3) 
 Lecture Notes for Chap. 1 
 Lecture Notes for Chap. 2  
  Homework 4 (due10/6):Chapt 1: #15,16,29 (skip k-cube), 31, Chapt 2: #3(skip part v),5 ,9(i), plus #33 on p. 48 of the Applied Combinatorics text.
Week 8-- Oct 6-13: Chapt 4
 Lecture Notes for Chap. 4  
  Homework 5 (due10/18):Chapt 4: 5(ii),8,10,13,14,15,16,17,18,19 plus #24 on p. 43 of Applied Combinatorics text
Week 9-- Oct 18-20: Chap 5.1,5.3 and Review for QuiZ
 Lecture Notes for Chap. 5  
  Homework 6 (due10/25) Chapt 4: 22,23,24,25};Chapt 5: #1, 4(i)(ii), 7,8, 19
 AMS 303 Old Quiz Questions and Solutions 
Week 10- Oct 25-27): Chapt 5, Quiz on Oct 27. 
  Homework 7 (due11/1):Chapt 5: #9, 12, 25, 28, 31.
Week 11-  Nov 1-3: Review and Test 2 (Test 2 on Nov 3th) 
(you are allowed a 2-sided page of definitions and statements of theorems-- no proofs, no solutions to HW problems))
 Past Second Tests and Solutions

 Solutions to Homeworks 4,5,6 (with old numbering 1,2,3
Week 12-15 Nov 8 - Dec 1: Postlude- Cryptanalysis Read the Postlude in the text before Tuesday's class. Homework to finish for class (do before class) Nov 8:: XTEIA DSL ASQA FKSF FKY IVYOPYUJQ NI PAY NI LNVRA TU SMYVTJSU UYLAESEYV YUCDTAK SUR FKYTV VSUG NVRYV SVY JDNAYDQ VYDSFYR Nov 10: Postlude problem #2 (Error in text, the repeated sequence is JPLENFYV -the L was missing) Nov 15: Postlude problem #3 Nov 17: Receive takehome cryptogram- due Dec 13 by 4 pm (for details, see below) Spring 2022 File with Everyone's TakehomeProject The following link explains the ways polyalphabetic encoding works Polyalphabtic Encoding The following link to frequency strips will be used in class to illustrate solving polyalphabetic codes Sample Frequency Strips The following links are helpful in the takehome project Template for Keyword Tables Template for Aligning Alphabets If you are having a problem, this file covers 99% of issues. PLEASE READ Tips for Takehome Final Take-Home Final due on Dec 13 by 4 pm . FOR FULL CREDIT: submit decoded cryptogram to Prof. Tucker by email along with pictures of aligned alphabets and trigraph table for collapsed cryptogram.
Historical Curve in Prof. Tucker's AMS 303 classes:
approximately 35% A's, 40% B's, 20% C's, 5% D's,F's&W's