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

I'm trying to write a proof ot demonstrate that every finite domain contains

an identity element.

2. Relevant equations

3. The attempt at a solution

If I can think of the operation from the ring as a mapping...like x->yx..where y are just values from the domain and then to consider the possibility that for one y from the domain the following happens x=xy then maybe this will work.But not for addition

How should I think about this problem?

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# Homework Help: Every nite domain contains an identity element.

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