Resumen de Alternating group actions on spin 4-manifolds
Let X be a smooth, closed, connected spin 4-manifold with b1(X)=0 and non-positive signature σ(X). In this paper we use Seiberg-Witten theory to prove that if X admits a spin alternating A5 action, then b+2(X)≥|σ(X)|/8+3 under some non-degeneracy conditions.
