Definition:Duodecimal Notation

Definition
Duodecimal notation is the technique of expressing numbers in base $12$.

Every number $x \in \R$ is expressed in the form:
 * $\ds x = \sum_{j \mathop \in \Z} r_j 12^j$

where:
 * $\forall j \in \Z: r_j \in \set {0, 1, \ldots, 10, 11}$

In order to be able to represent numbers in such a format conveniently and readably, it is necessary to render the digits $10$ and $11$ using single characters.

There is no universal convention for this, but a common approach is to use the following:

that is, the initial letters of ten and eleven.