Gromov-Witten invariants of the Hilbert scheme of 3-points on P^2

Using obstruction bundles, composition law and the localization formula, we compute certain 3-point genus-0 Gromov-Witten invariants of the Hilbert scheme of 3-points on the complex projective plane. Our results partially verify Ruan’s conjecture about quantum corrections for this Hilbert scheme.