目次

 Ingredients.Number theory. Divisibility of integers. Congruences.The Fundamental Theorem of Number Theory. Multiplicative number theory. Additive number theory. Combinatorics.Basic enumeration principles.Counting lists, sequences, sets, and multisets.Binomial coefficients and Pascal’s Triangle. Some recurrence relations. The integer lattice and its layers. Group theory. Finite abelian groups. Group isomorphisms. The Fundamental Theorem of Finite Abelian Groups. Subgroups and cosets. Subgroups generated by subsets. Sumsets. Appetizers. Spherical designs. Caps, centroids, and the game SET. How many elements does it take to span a group? In pursuit of perfection.The declaration of independence. Sides. Auxiliary functions. Entrees. Maximum sumset size. Spanning set. Sidon sets. Minimum sumset size. The critical number. Zero-sum-free sets. Sum-free sets. Pudding. Proof of Propositions and Theorems