Re: [math-fun] natural numbers

Interesting. I use Z with a positive integer subscript n for Z/nZ, and with an appended asterisk for the multiplicative group of integers mod n relatively prime to n. On 03-Mar-15 12:45, Warren D Smith wrote:

I like "Z" with subscript (or superscript) ">=0" or Z with subscript ">0" depending what you want.

"N" usually seems stupid by comparison. (How about "U" for the "unnatural numbers"?)

For some reason I'm not too horrified by "Q" to denote the rationals instead of (say) "Z/Z" which seems less wasteful.

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