Hi there!(adsbygoogle = window.adsbygoogle || []).push({});

I need a little help from your side. Could you give me an example of a quadratic number inZ_{3}

there is a lemma, that says there are exactly two quadratic numbers there, but I somehow cannot figue out how to find them :(

I know that there are 3 equivalence classes there: [0], [1], [2], so the numbers should be equivalent to one of these...

Thanks´s very much in advance,

marin

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# Quadratic numbers

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