Math 2001
Introduction to Discrete Mathematics


Summer 2022

Please see below for lecture summaries, homework and other study material. For your grades, please see Canvas.

Date Topics
Jun.01. Basic definitions and notation about sets. Element membership vs subset containment. Equality of sets. Cartesian products. Power sets. Notes.
HW1 (due Fri., Jun. 3): 1.1: 3, 12, 18, 31; 1.2: 9, 15; 1.3: 13, 14, 15; 1.4: 14, 15.
Jun.02. Operations on sets. Venn diagrams. More proofs of set equalities. DeMorgan's Law. Notes.
Jun.03. Indexed sets. Statements and truth tables. How to prove various types of statements. Notes.
HW2 (due Tue., Jun. 7): 1.5: 2, 6, 10; 1.6: 2, 6; 1.7: 4, 10; 1.8: 2, 4, 8, 14; 2.1: 4, 10.
Jun.06. Logical equivalences. Open statments and quantifiers. Notes.
Jun.07. The multiplication, addition, and subtraction principles for counting. First counting problems. Notes.
HW3 (due Tue., Jun. 10): 2.5: 6, 8, 10; 2.6: 3, 12. 2.7: 4, 8; 3.3: 2, 4, 8, 10; 3.4: 3, 4, 10, 12.
Jun.08. Permutation vs combinations. More counting problems. Notes.
Jun.09. Combinatorial proofs. Counting worksheet. Notes. Worksheet.
Jun.10. The binomial theorem. Pascal's triangle. Midterm I. Notes.
HW4 (due Tue., Jun. 14): 3.5: 4, 8, 9, 10, 18; 3.6: 2, 3, 4, 7.
Jun.13. The inclusion-exclusion principle. Multisets and the bars-and-stars method. Notes.
Jun.14. More bars-and-stars problems. Multiset permutations. Summary of counting problem types. Notes.
HW5 (due Fri., Jun. 17): 3.7: 4, 6, 8, 12; 3.8: 2, 5, 7, 8, 10, 12, 14; 3.9: 2, 3, 4.
Jun.15. The pigeonhole and division principles. More combinatorial identities. Notes.
Jun.16. Foundational definitions related to integer division. Direct proofs of conditional statements. Notes.
Jun.17. More direct proofs. Worksheets on counting (multisets) and direct proofs. Notes. Worksheet on more counting problems. Worksheet on proofs.
HW6 (due Tue., Jun. 21): 3.10: 6, 7, 8. Chapter 4: 4, 10, 12, 16, 20, 26.
Jun.20. Proofs via contrapositives. Proofs by contradiction. Proving equivalences. Recommendations for mathematical writing. Notes.
Jun.21. Proofs of existential claims. Constructive vs. non-constructive proofs. Notes. Worksheet on more proofs.
HW7 (due Fri., Jun. 24): Ch. 5: 6, 7, 22, 28; Ch. 6: 8, 9, 10, 14; Ch. 7: 6, 12, 32, 33.
Jun.22. Proofs of set containments and set equalities. Disproofs and true/false problems. Notes.
Jun.23. Mathematical induction and strong mathematical induction. Notes. Third worksheet on proofs.
Jun.24. An inductive proof about graph theory. Midterm II. Notes.
HW8 (due Tue., Jun. 28): Ch. 8: 6, 19, 20, 30; Ch. 9: 8, 18, 22; Ch. 10: 4, 6, 8.
Jun.27. More inductive proofs: fundamental theorem of arithmetic, Fibonacci numbers. Notes. Worksheet on induction.
Jun.28. Relations and equivalence relations. Notes.
HW9 (due Fri., Jul. 1): Ch. 10: 16, 20, 21, 26, 42; 11.2: 14, 15; 11.3: 2, 4, 8.
Jun.29. Partitions from equivalence relations. Basic notions concerning functions. Notes.
Jun.30. Proof and counting problems on functions. Review for final exam. Notes.
Jul.01. Final exam.