Ricardo Weder and Dimitri Yafaev
On Inverse Scattering at a Fixed Energy for Potentials with a Regular Behaviour at Infinity
(60K, Latex)

ABSTRACT.  We study the inverse scattering problem for electric potentials 
and magnetic fields in $\ere^d, d\geq 3$, that are asymptotic 
sums of homogeneous terms at infinity. The main result is that 
all these terms can be uniquely reconstructed from the singularities 
in the forward direction of the scattering amplitude at some positive energy.