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Currently displaying 1 – 3 of 3

Order by Relevance | Title | Year of publication

Hurwitz equivalence in tuples of generalized quaternion groups and dihedral groups.

Hou, Xiang-dong — 2008

The Electronic Journal of Combinatorics [electronic only]

Determination of a type of permutation trinomials over finite fields

Xiang-dong Hou — 2014

Acta Arithmetica

Let $f = a x + b x^{q} + x^{2 q - 1} \in_{q} [x]$ . We find explicit conditions on a and b that are necessary and sufficient for f to be a permutation polynomial of $_{q ²}$ . This result allows us to solve a related problem: Let $g_{n, q} \in_{p} [x]$ (n ≥ 0, $p = c h a r_{q}$ ) be the polynomial defined by the functional equation $\sum_{c \in_{q}} {(x + c)}^{n} = g_{n, q} (x^{q} - x)$ . We determine all n of the form $n = q^{α} - q^{β} - 1$ , α > β ≥ 0, for which $g_{n, q}$ is a permutation polynomial of $_{q ²}$ .

A class of permutation trinomials over finite fields

Xiang-dong Hou — 2014

Acta Arithmetica

Let q > 2 be a prime power and $f = - x + t x^{q} + x^{2 q - 1}$ , where $t \in *_{q}$ . We prove that f is a permutation polynomial of $_{q ²}$ if and only if one of the following occurs: (i) q is even and $T r_{q / 2} (1 / t) = 0$ ; (ii) q ≡ 1 (mod 8) and t² = -2.

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