Rational homology cobordisms of lens spaces (Paolo Aceto)Séminaire « Topologie »
Orateur : Paolo Aceto (Université de Lille)
Lieu : salle des Séminaires M3
We will give a brief introduction to the integral and rational homology cobordism groups of 3-manifolds. Then, focusing on lens spaces, we will explore various results via lattice theoretic arguments which rely on Donaldson’s diagonalization theorem. We will also explore consequences regarding the problem of embedding 3-manifolds in various 4-manifolds.