CONVERGENT CLOSE-COUPLING CALCULATIONS OF POSITRON-HYDROGEN $S$-WAVE MODEL Alisher Kadyrov$^*$ and Igor Bray The Flinders University of South Australia, G.P.O. Box 2100, Adelaide 5001, Australia} We consider positron-hydrogen scattering within the $S$-wave model, where only states of zero orbital angular momentum are included. Convergence is studied as a function of a Laguerre-based pseudostate expansion of both the atomic and positronium states.