Definition:Greek Numerals/Attic System
Definition
The Greek numerals from the Attic period (c. 500 BCE to c. 300 BCE) are similar to the Roman system:
\(\ds \textsf{I}:\) | \(\) | \(\ds \)one\(\) | ||||||||||||
\(\ds \Pi:\) | \(\)penta\(:\) | \(\ds \)five\(\) | ||||||||||||
\(\ds \Delta:\) | \(\)deka\(:\) | \(\ds \)ten\(\) | ||||||||||||
\(\ds \Eta:\) | \(\)hekaton\(:\) | \(\ds \)one hundred\(\) | ||||||||||||
\(\ds \Xi:\) | \(\)chilioi\(:\) | \(\ds \)one thousand\(\) | ||||||||||||
\(\ds \Mu:\) | \(\)myriad\(:\) | \(\ds \)ten thousand\(\) |
$\Pi$ was later written in a different form, with a shorter right leg, and from there it appears to have evolved into $\Gamma$.
Numbers were combined in a similar way to Roman numbers, but with additive forms only.
For example, $32718$ would have been written $\Mu \Mu \Mu \Xi \Xi \Eta \Eta \Eta \Eta \Eta \Eta \Eta \Delta \Pi \textsf {III}$.
Later evolutions introduced symbols for $50$, $500$ and $5000$, consisting of a tiny version of the appropriate power of $10$ nestled under the right hand (short) branch of the short-leg version of $\Pi$.
Such characters are difficult to render neatly, and as they are of limited importance, this has not been attempted on $\mathsf{Pr} \infty \mathsf{fWiki}$.
Sources
- 2008: Ian Stewart: Taming the Infinite ... (previous) ... (next): Chapter $3$: Notations and Numbers: Greek numerals