7
AC0
•Definition A language L µ {0,1}* is in non-uniform AC0 if there exists d > 0, a polynomial p(n), and a family of circuits (Cn)n ¸ 0 s.t.:

    size(Cn) · p(n)
    depth(Cn) · d, and
8 w 2 {0,1}*:  w 2 L   iff   Cn(w) = true,  where n=|w|