Piecewise constructions of inverses of cyclotomic mapping permutation polynomials
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🧮 math.NT
keywords
permutationcyclotomicfiniteinversesmappingpiecewisepolynomialsarbitrary
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Given a permutation polynomial of a large finite field, finding its inverse is usually a hard problem. Based on a piecewise interpolation formula, we construct the inverses of cyclotomic mapping permutation polynomials of arbitrary finite fields.
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