Abstract
The method of exact integral equations is formulated in terms of wavefunctions in such a way that a direct comparision becomes possible to the more conventional methods for treating nuclear reactions. It is shown how to develop the wavefunction rigorously in an expansion which outside the reaction region is identical to the resonating-group ansatz (below the breakup threshold). Common and different aspects of the approximations employed in both approaches are clarified. The three-particle problem is used for the purpose of demonstration and for the execution of test calculations. Possibilities are discussed of how experience with one approach could be fruitful for the further development of the other.
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