# one

Last modified by Unknown User on 2016/05/14 09:21

# One (number) Notations

In algebra and calculus, one the multiplicative identity of any ring.

### Descriptions of this Symbol

- OpenMath's alg1/one
- MathML only seems to allow zero as a special Number
- MathWorld's 1
- Wikipedia's Multiplicative identity

### Observations of one

#### Arabic (Saudi Arabia and some provinces)

On the right we find the Saudi math book for elementary-school shows one. In this example 15 multiplied by 1 (WAHED in Arabic context).

Download the book and find the example in page 22.

#### Dutch

The Dutch book Basisboek Wiskunde shows the digit one in page 19. the example represents a multiplication process.

Download the book and find the example.

#### English

In the algebra book in bibliography we find this example on the right represents addition process, one plus nine.

Find the example in page 2 in google book links