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(*         *      The Rocq Prover / The Rocq Development Team           *)
(*  v      *         Copyright INRIA, CNRS and contributors             *)
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(*         *     GNU Lesser General Public License Version 2.1          *)
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(** * HexadecimalQ  Proofs that conversions between hexadecimal numbers and [Q] are bijections. *)

Lemma dnorm_involutive d : dnorm (dnorm d) = dnorm d.