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›› 2004, Vol. 21 ›› Issue (3): 299-304.DOI: 10.7523/j.issn.2095-6134.2004.3.002

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Realizability of Some Classes of Abstract Branch Data over Riemann Sphere

JIANG YunFeng   

  1. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China
  • Online:2004-05-10

Abstract:

branch data,this paper gives a sufficient and necessary condition of them to be realized as the branch data of some branched coverings over the Riemann sphere.

Key words: Riemann sphere, Riemann Hurwitz formula, branched coverings

CLC Number: