Unit 2: Structures

2.1 GCDs

2.2 Congruences

2.3 Euler's Theorem

2.4 RSA Encryption

2.5 Digraphs: Walks & Paths

2.6 Directed Acyclic Graphs (DAGs) & Scheduling

2.7 Partial Orders and Equivalence

2.8 Degrees & Isomorphism

2.9 Coloring & Connectivity

2.10 Trees

2.11 Stable Matching