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In this paper the authors study generic covers of C2 branched over {xn+ym}=0 s.t. the total space is a normal analytic surface. They found a complete description of the monodromy of the cover in terms of the monodromy graphs and an almost complete description of the local fundamental groups in case (n,m)=1. For the general case, they give explicit descriptions of base changes in terms of monodromy...
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