A New Scheme for Computing with Algebraically Closed Fields

  • Authors:
  • Allan Steel

  • Affiliations:
  • -

  • Venue:
  • ANTS-V Proceedings of the 5th International Symposium on Algorithmic Number Theory
  • Year:
  • 2002

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Abstract

A new scheme is presented for computing with an algebraic closure of the rational field.It avoids factorization of polynomials over extension fields, but gives the illusion of a genuine field to the user.A technique of modular evaluation into a finite field ensures that a unique genuine field is simulated by the scheme and also provides fast optimizations for some critical operations.F ast modular matrix techniques are also used for several non-trivial operations.The scheme has been successfully implemented within the Magma Computer Algebra System.