An explicit formula for a branched covering

J.A.Hillman

Abstract

We give an explicit formula for a 2-fold branched covering from ${\mathbb{CP}}^2$ to $S^4$, and relate it to other maps between quotients of $S^2\times S^2$.

Keywords: branched covering, complex projective plane.

AMS Subject Classification: Primary 57M10; secondary 57N13.