a MUCH better photo of the icosahedron

[Ralf Stephan]

Brendan McKay:
> Now here is an interesting trivium: Even though Persian and Arabic
> are written right to left, numbers are written left to right.
> You are all about to jump up and tell me that the order of writing a
> decimal positional system is arbitrary, so what I call left to right
> might as well be called right to left starting at the high-order
> digit. However, that is not correct and I reassert that numbers are
> written left to right.  Can anyone guess what my proof is?

The fact that our number system is derived from Arabic,
and we use it left-to-right?

(Not a hard proof but a good reason.)


ralf