Definition:Commensurable/Notation

Definition
There appears to be no universally acknowledged symbol to denote commensurability.

in his edition of makes the following suggestions:


 * $(1): \quad$ To denote that $A$ is commensurable or commensurable in length with $B$:
 * $A \mathop{\frown} B$


 * $(2): \quad$ To denote that $A$ is commensurable in square with $B$:
 * $A \mathop{\frown\!\!-} B$


 * $(3): \quad$ To denote that $A$ is incommensurable or incommensurable in length with $B$:
 * $A \mathop{\smile} B$


 * $(4): \quad$ To denote that $A$ is incommensurable in square with $B$:
 * $A \mathop{\smile\!\!-} B$

This convention may be used on if accompanied by a note which includes a link to this page.