This volume focuses on the classical theory of number-theoretic functions emphasizing algebraic and multiplicative techniques. It contains many structure theore

In 1202, a 32-year old Italian finished one of the most influential books of all time, which introduced modern arithmetic to Western Europe. Devised in India in

We live in a world of numbers and mathematics, and so we need to work with numbers and some math in almost everything we do, to control our happiness and the di