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Notes on APN functions, semibiplanes and dimensional dual hyperovals

机译:关于APN功能,半双翼和维双超卵形的注释

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摘要

Two geometric objects, incidence graphs of semibiplanes and dimensional dual hyperovals, are respectively associated with APN and quadratic APN functions. From Proposition 2 (resp. Proposition 5), two APN (resp. quadratic APN) functions are CCZ (resp. extended affine) equivalent if and only if the associated graphs (resp. dimensional dual hyperovals) are isomorphic. The former graphs for almost bent functions are distance regular graphs by Proposition 4. The structures of automorphism groups of these geometric objects are investigated in Proposition 3 and Lemma 7. In particular, (Edel and Pott, Adv Math Commun 3:59–81 (2009), Question 2) is negatively answered.
机译:两个几何对象(半双翼飞机的入射图和二维双椭圆形)分别与APN和二次APN函数相关联。从命题2(分别是命题5)中,当且仅当关联图(维度维双超卵形)是同构的时,两个APN(二次方APN)功能才是CCZ(扩展仿射)等效项。以前几乎弯曲函数的图是命题4的距离正则图。在命题3和引理7中研究了这些几何对象的自同构群的结构。特别是,(Edel和Pott,Adv Math Commun 3:59–81( 2009),问题2)的答案是否定的。

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