Number Theory: A Very Short Introduction

Number theory is the branch of mathematics primarily concerned with the counting numbers, especially primes. It dates back to the ancient Greeks, but today it has great practical importance in cryptography, from credit card security to national defence. This book introduces the main areas of number theory, and some of its most interesting problems.

Teoria numerelor este ramura matematicii care se ocupa in primul rand de numararea numerelor, in special a primelor. Acesta dateaza din vechii greci, dar astazi are o mare importanta practica in criptografie, de la securitatea cardului de credit pana la apararea nationala.