## 2.5 Notation

The natural integers are elements of $\mathbf{N} = \{ 1, 2, 3, \ldots \} $. The integers are elements of $\mathbf{Z} = \{ \ldots , -2, -1, 0, 1, 2, \ldots \} $. The field of rational numbers is denoted $\mathbf{Q}$. The field of real numbers is denoted $\mathbf{R}$. The field of complex numbers is denoted $\mathbf{C}$.

## Post a comment

Your email address will not be published. Required fields are marked.

In your comment you can use Markdown and LaTeX style mathematics (enclose it like `$\pi$`

). A preview option is available if you wish to see how it works out (just click on the eye in the toolbar).

Unfortunately JavaScript is disabled in your browser, so the comment preview function will not work.

All contributions are licensed under the GNU Free Documentation License.

## Comments (3)

Comment #3544 by Laurent Moret-Bailly on

Comment #3676 by Johan on

Comment #6297 by RJ AcuĂ±a on