Unit · year 1
MU-105 · Discrete Mathematics
Threads structure · number24 lectures6 theorems
Counting, graphs, and modular arithmetic — the mathematics of the finite.
PREREQUISITES
Lectures
| L01 | Counting Principles: Sum and Product — |
| L02 | Permutations and Combinations — |
| L03 | Binomial Coefficients and Pascal's Triangle |
| L04 | The Binomial Theorem |
| L05 | Combinatorial Identities and Double Counting |
| L06 | The Inclusion–Exclusion Principle |
| L07 | Derangements and Applications |
| L08 | Recurrence Relations — |
| L09 | Generating Functions: First Steps — |
| L10 | Modular Arithmetic and Congruences — |
| L11 | Linear Congruences and Modular Inverses — |
| L12 | Fermat's Little Theorem |
| L13 | The Chinese Remainder Theorem |
| L14 | Applications to Cryptography |
| L15 | Graphs: Definitions and Representations — |
| L16 | Degree Sequences and the Handshaking Lemma |
| L17 | Paths, Cycles, and Connectivity — |
| L18 | Trees and Spanning Trees — |
| L19 | Eulerian Circuits |
| L20 | Hamiltonian Cycles and Why They Are Harder |
| L21 | Bipartite Graphs and Matchings — |
| L22 | Graph Colouring — |
| L23 | Boolean Algebra and Logic Circuits — |
| L24 | Synthesis: Counting, Structure, and Algorithm |
Theorems in this unit
T-028
The binomial theorem
An expansion of (x+y)^n in terms of binomial coefficients.
T-029
The inclusion–exclusion principle
The size of a union from the sizes of intersections.
T-030
The handshaking lemma
In any graph the sum of degrees is twice the number of edges.
T-031
Fermat's little theorem
a^p ≡ a (mod p) for prime p.
T-032
The Chinese remainder theorem
Congruences with coprime moduli have a unique joint solution.
T-033
Euler's theorem on circuits
A connected graph has an Eulerian circuit iff every vertex has even degree.