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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-07-17 and was most recently seen on 2026-07-17.
In mathematics, a permutation polynomial is a polynomial that acts as a permutation of the elements of the ring, i.e. the map is a bijection. In case the ring is a finite field, the Dickson polynomials, which are closely related to the Chebyshev polynomials, provide examples.
Over a finite field, every function, so in particular every permutation of the elements of that field, can be written as a polynomial function.
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