## 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 $\mathbf{C}$.

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## Comments (2)

Comment #3544 by Laurent Moret-Bailly on

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