An infinite class of quadratic APN functions which are not equivalent to power mappings

We exhibit an infinite class of almost perfect nonlinear quadratic polynomials from F
_2n
to F
_2n
(n ges 12, n divisible by 3 but not by 9). We prove that these functions are EA-inequivalent to any power function and that they are CCZ-inequivalent to any Gold function. In a forthcoming full paper, we shall also prove that at least some of these functions are CCZ-inequivalent to any Kasami function