S. Richard, R. Tiedra de Aldecoa
Explicit formulas for the Schroedinger wave operators in R^2
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ABSTRACT.  In this note, we derive explicit formulas for the Schroedinger wave operators in R^2 under the assumption that 0-energy is neither an eigenvalue nor a resonance. These formulas justify the use of a recently introduced topological approach of scattering theory to obtain index theorems.