The "self-power" map x → x x modulo m and its generalized form x → x x n modulo m are of considerable interest for both theoretical reasons and for potential applications to cryptography. In this paper, we use p-adic methods, primarily p-adic interpolation, Hensel's lemma, and lifting singular points modulo p, to count fixed points and two-cycles of equations related to these maps when m is a prime power.
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