PreprintAn explicit formula for a branched coveringJ.A.HillmanAbstractWe give an explicit formula for a 2fold 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.
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