Knaph
Stories

The Story of Number

Woodcut of a crowned woman between two men at tables, one moving counters, the other writing figures.
Lady Arithmetic between the counting board and the new figures, from Reisch's Margarita philosophica (1503).

Image: Gregor Reisch, Margarita philosophica (Freiburg, 1503), Library of Congress · Public domain

A Knaph story

The Story of Number

How people kept inventing the numbers they first called impossible

c. 1800 BCE – 1891

From a square root of two scratched in clay to the complex plane: how counting grew into zero, debts, fractions, irrational lengths and imaginary numbers, and why each was doubted first.

A Knaph story

The Story of Number

How people kept inventing the numbers they first called impossible

c. 1800 BCE – 1891

From a square root of two scratched in clay to the complex plane: how counting grew into zero, debts, fractions, irrational lengths and imaginary numbers, and why each was doubted first.

Title page