• Jan 1, 1000

# 3000 BC: Natural numbers

The Egyptians and Babylonians were first recorded as using the natural numbers and rationals.
• Jan 1, 1000

# 500 BC Irrationals

The Greek philosopher sect called the Pythagoreans suppresses evidence that irrationals exist, by murdering the mathematician responsible for the proof.
• Period: Jan 1, 1501 to

## Imaginary numbers

Imaginary numbers are first used to give notional solutions.
• # Imaginary numbers

An imaginary number is a number that can be written as a real number multiplied by the imaginary unit , which is defined by its property . An imaginary number has a negative or zero square. For example, is an imaginary number and its square is .
An imaginary number can be added to a real number to form a complex number of the form , where and are called, respectively, the real part and the imaginary part of the complex number. Imaginary numbers can therefore be thought of as complex numb
• # Real Numbers

Real Numbers uncontably infine Algbaic numbers is countably infine
• Period: to

## Real Numbers

Real Numbers uncontably infine Algbaic numbers is countably infine
• # Whole Numbers

Whole Numbers are Counting numbers