Weierstrass Pairs and Minimum Distance of Goppa Codes

  • Authors:
  • Gretchen L. Matthews

  • Affiliations:
  • Department of Mathematics, University of Tennessee, Knoxville, TN 37996

  • Venue:
  • Designs, Codes and Cryptography
  • Year:
  • 2001

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Abstract

We prove that elements of the Weierstrassgap set of a pair of points may be used to define a geometricGoppa code which has minimum distance greater than the usuallower bound. We determine the Weierstrass gap set of a pair ofany two Weierstrass points on a Hermitian curve and use thisto increase the lower bound on the minimum distance of particularcodes defined using a linear combination of the two points.