P-Adic numbers, basic: Difference between revisions

p-Adic numbers were introduced around 1900 by Hensel. p-Adic expansions

(a series of digits 0 ≤ d < p times p-power weights)

powers of p (to the left in the notation used here).

For example, the number 4 (100.0) has ''smaller'' 2-adic norm than 1/4 (0.01).