Given a closed 4-manifold M, let M^* be the simply-connected 4-manifol obtained from M by killing the fundamental group. We study the relation between the intersection forms \lambda_M and \lambda_(M^*). Finally, some topological consequences and examples are described.
On the intersection forms of closed 4-manifolds / Cavicchioli, Alberto; Hegenbarth, F.. - In: PUBLICACIONS MATEMÀTIQUES. - ISSN 0214-1493. - STAMPA. - 36:(1992), pp. 73-83.