In this note we study logarithmic transformations in the sense of
differential topology on two fibers of the Hopf surface. It is known that such
transformations are susceptible to yield exotic smooth structures on
four-manifolds. We will show here that this is not the case for the Hopf
surface, all integer homology Hopf surfaces we obtain are diffeomorphic to the
standard Hopf surface.Comment: 9 page
