Math 3345: Lecture Notes

Spring 2022
Max Kutler

These notes are the basis for our Math 3345 lectures. There may be material discussed in class which is not included in these notes, and vice versa.



Lecture 1: Setting the stage, logical sentences

Lecture 2: Negation, conjunction, disjunction

Lecture 3: De Morgan's laws, distributive laws

Lecture 4: Conditional sentences, converse and contrapositive

Lecture 5: Biconditional sentences, conditional proof

Lecture 6: Conditional proof, tautologies

Lecture 7: Quantifiers

Lecture 8: Generalized De Morgan's and distributive laws

Lecture 9: Order of quantifiers, unique existence

Lecture 10: Induction

Lecture 11: Parity

Lecture 12: Axioms for the integers

Lecture 13: The well-ordering principle

Lecture 14: Divisibility

Lecture 15: Primes

Lecture 16: The infinitude of primes

Lecture 17: Real and rational numbers

Lecture 18: Irrational numbers

Lecture 19: Division Algorithm

Lecture 20: Greatest common divisors, Euclidean Algorithm

Lecture 21: Reverse Euclidean Algorithm, congruence of integers

Lecture 22: Modular arithmetic

Lecture 23: Every integer is a product of primes

Lecture 24: Division by a prime, unique factorization

Lecture 25: Prime factorization and divisibility

Lecture 26: Irrational square roots, sets

Lecture 27: Set-builder notation, subsets

Lecture 28: Subsets, algebra of sets

Lecture 29: DeMorgan's laws for sets, sets of sets, generalized unions and intersections

Lecture 30: More generalized unions and intersections, ordered pairs

Lecture 31: Cartesian products, functions

Lecture 32: Range, graphs

Lecture 33: Function composition, surjections and injetions graphs

Lecture 34: Bijections, inverse functions

Lecture 35: Cardinality

Lecture 36: Countable sets

Lecture 37: Uncountability of R