Talk:Euler's totient function
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Some motivation and derivation of the formula would make this article more useful.--MCrawford 13:18, 20 June 2006 (EDT)
I changed the part under "Notation". It surely is not best as it is now, but the old one was surely wrong:
- 
is _not_ a capital letter "Phi", but still a lower case character; compare: 
to .
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is about as widely spread as , e.g. the normal Wikipedia and more than half of my books prefer .
--ZetaX 10:58, 30 January 2008 (EST)
