## 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.

: Primary 57M10; secondary 57N13.

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 Monday, January 9, 2017