Sökning: "Siegfried Bosch"

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1. 1. Arithmetic of three-point covers

   Författare :Björn Selander; Siegfried Bosch; Uppsala universitet; []
   Nyckelord :Algebra and geometry; Algebra och geometri;

   Sammanfattning : Any cover of the Riemann sphere with rational branch points is known to be defined over the algebraic numbers. Hence the Galois group of the rationals acts on the category of such branched covers. Particulars about this action are still scarce, even in the simplest non-abelian case, the case with just three branch points. LÄS MER