Roman numerals (was Re: Barry Popik namecheck)

[Mark Mandel]

The subtractive method is only used to subtract the unit from the five of
the same order of magnitude or from the next order of magnitude:
 IV
 IX
 XL
 XC
 CD
 CM
and then that's appended to whatever higher-order terms are in there.

m a m

On Sun, Apr 6, 2008 at 9:56 PM, Benjamin Barrett <gogaku at ix.netcom.com> wrote:
> "IXX century" gets just over 1000 hits on Google. (Small compared to
>  "XIX century," but still quite a few.) I've never seen them written
>  this way before. I didn't find anything for "CMM century" or "IC"
>  century, though. BB
>
>  On Apr 6, 2008, at 12:53 PM, sagehen wrote:
>  > doubt if they were all eighth-born, though the IXX Cent families in

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