Abstract
The following conjecture due to Y. Edel is affirmatively solved: two quadratic APN (almost perfect nonlinear) functions are CCZ-equivalent if and only if they are extended affine equivalent.
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Yoshiara, S. Equivalences of quadratic APN functions. J Algebr Comb 35, 461–475 (2012). https://doi.org/10.1007/s10801-011-0309-1
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DOI: https://doi.org/10.1007/s10801-011-0309-1