On a generalization of Stickelberger's Theorem

  • Authors:
  • Peter Scheiblechner

  • Affiliations:
  • -

  • Venue:
  • Journal of Symbolic Computation
  • Year:
  • 2010

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Abstract

We prove two versions of Stickelberger's Theorem for positive dimensions and use them to compute the connected and irreducible components of a complex algebraic variety. If the variety is given by polynomials of degree @?d in n variables, then our algorithms run in parallel (sequential) time (nlogd)^O^(^1^) (d^O^(^n^^^4^)). In the case of a hypersurface, the complexity drops to O(n^2log^2d) (d^O^(^n^)). In the proof of the last result we use the effective Nullstellensatz for two polynomials, which we also prove by very elementary methods.