(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Let p be a positive prime and let Up be the unit group of Z/Zp. Show that Up is

cyclic and thus Up [itex]\cong[/itex] Z/Z(p − 1).

3. The attempt at a solution

What do they mean by the unit group? Is that just the identity??? Is it the group [p]? I'm lost without starting the question...

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# Showing the unit group is cyclic

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