Permutations

[Richard Guy]

Just used colored pens in MS.    R.

On Wed, 17 Dec 2003, Marc LeBrun wrote:

>  >=Eric W. Weisstein
>  >>=Christopher Tomaszewski
>  >> Here are all 24 permutations of {1,2,3,4}, with those satisfying my
>  >> criteria in red:
>  > There is no such thing as red in email...
> 
> This point is well-taken, eMail ought always support the least common 
> denominator.  On the other hand that appears likely to become HTML...
> 
> Sneaky Advertisement Dept.: You may recall my "numbral" notation for 
> general "object oriented arithmetic", where you write just [n] for the n-th 
> whatever, understood from context.  This originated as a way to ASCIIfy 
> "The Book of Numbers"'s convention of printing numbers in black and 
> "nimbers" in red.  Don Knuth cleverly christened those []s the "red shift" 
> operator!  So I guess if you really want red in eMail, you can use this 
> notation!  (RKG: Did the authors of BoN and WW do anything like this?  Or 
> did you just use colored pens in manuscript?)
> 
>