Campbell D. An Open Door to Number Theory

Providence, Rhode Island, USA: American Mathematical Society, 2018. — 297 p. — (Series: AMS / MAA, volume 39). — ISBN10: 1470443481.A well-written, inviting textbook designed for a one-semester, junior-level course in elementary number theory. The intended audience will have had exposure to proof writing, but not necessarily to abstract algebra. That audience will be well prepared by this text for a second-semester course focusing on algebraic number theory. The approach throughout is geometric and intuitive; there are over 400 carefully designed exercises, which include a balance of calculations, conjectures, and proofs. There are also nine substantial student projects on topics not usually covered in a first-semester course, including Bernoulli numbers and polynomials, geometric approaches to number theory, the $p$-adic numbers, quadratic extensions of the integers, and arithmetic generating functionsThe Integers, Z
Modular Arithmetic in Z/mZ
Quadratic Extensions of the Integers, Z
An Interlude of Analytic Number Theory
Quadratic Residues 1
Further Topics
Appendixes
Tables
Projects Duff Campbell, Hendrix College, Conway