It is well known that the southern song style of counting rods, had different forms for the digits 4, 5 and 9 https://en.wikipedia.org/wiki/Counting_rods , however currently there is no way to represent such forms, a proposal to add them would only occupy five code points, since number four is identical both vertical and horizontally.
[http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Yanghui_triangle.gif/200px-Yanghui_triangle.gif]<https://en.wikipedia.org/wiki/Counting_rods>
Counting rods - Wikipedia, the free encyclopedia<https://en.wikipedia.org/wiki/Counting_rods>
en.wikipedia.org
Counting rods represent digits by the number of rods, and the perpendicular rod represents five. To avoid confusion, vertical and horizontal forms are alternately used.
Received on Sat Aug 13 2016 - 17:07:15 CDT
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