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Help to prove : if a|b then phi(a) | phi(b)

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Help to prove : if a|b then phi(a) | phi(b)

Postby Guest » Sat Nov 26, 2011 1:50 pm

hello.
Can anyone prove this problem?
if a|b then phi(a) | phi(b). (b is natural number).

tanx.
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Re: Help to proof : if a|b then phi(a) | phi(b)

Postby Guest » Sun Nov 27, 2011 4:03 am

Please explain what is phi(a)?
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