the set of all functions from GF ̄n(q) to the complex field
the structure of invertible linear transform with convolution property over(F ̄n)is studied. The general form of such transform is presented in this paper. For F(F ̄n)
the set of all maps from GF ̄n(q) to GF(q)
it is proved that there exists no invertible linear transform with convolution property over F(F ̄n).