We show that for any finitely presented group G G , there is a simply connected closed 4-manifold containing an infinite family of topologically isotopic but smoothly inequivalent 2-links whose 2-link group is G G . We also show that, if G G satisfies the necessary topological conditions, these 2-links have nullhomotopic components.
Younes Benyahia (Thu,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: