P-adic numbers

P-adic numbers are a system of numbers introduced by the mathematician Kurt Hensel in 1897, which extends the concept of the usual rational numbers. They are constructed in a way that allows for a different notion of "closeness" between numbers, based on a chosen prime number \( p \). The core idea of p-adic numbers is to define a distance between numbers that is based on divisibility by a prime \( p \).