31 Oct
2003
31 Oct
'03
10:31 a.m.
On Fri, 31 Oct 2003, Jon Perry wrote:
First, let me apologise for my previous 'group' - I should have said 'multiplicative group of positive rationals less than or equal to 1'.
I'm afraid that isn't a group, since the inverse of a positive rational that's less than 1 is one that's greater than 1. It's unwise to try to use mathematical terminology if you don't know exactly what it means. Just speak of the collection of positive rationals less than or equal to 1, and you'll be OK.