Magma/Examples/Real Numbers

Examples of Magmas

Let $\R$ be the set of real numbers.

$\struct{\R, +}$, $\struct{\R, -}$ and $\struct{\R, \times}$ are all magmas.

Sources

• 1965: J.A. Green: Sets and Groups ... (previous) ... (next): $\S 4.4$. Gruppoids, semigroups and groups: Example $76$