αεα      f(f) = F(f)      ξ(ξ)


     F(F)﹖

     ~f(f) = F(f)

     F(F)﹖


     ~ _ ( – )


     
(f)

^
~ _ ( – )


     ~(αεα)

     ξ{~(ξεξ)ξ


~[ξ{~(ξεξ)ξε]


     [f(ξ,n)]'a = f(a,a)





~([~ξ(ξ)]'([~ξ(ξ)]'( )))


~{~[~ξ(ξ]'([~ξ(ξ)]'( ))}