Let p be prime in Z with Show that there is an integer with
Proof. Now I have p - 1 = 4k for some integers k. Then p = 4k - 1, pk = 4k^2 - k, so I have a square of something but with an extra k behind, how can I continue?
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Originally Posted by tttcomrader Let p be prime in Z with Show that there is an integer with Use Euler's criterion. Thus, is a quadradic residue if and only if hence if then is even and the congruence holds.
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