-
GUAVA homepage,
-
(with Amy Ksir and Tony Shaska)
Bases for Riemann-Roch spaces of hyperelliptic curves
- draft of a paper which describes
an explicit constructive method for
computing a basis B of L(D)=LC(D), where
C denote a hyperelliptic curve and let D be an effective
divisor on C. Examples using SAGE are given.
Uses rrbasis3.sage.
The latex source is also available.
-
(with Amy Ksir)
Automorphism groups of some AG codes.
We show that in many cases, the automorphism group of a curve and
the permutation automorphism group of a corresponding AG code are
the same. SAGE is uses in some examples. Appeared in
IEEE Trans. Info. Theory, vol 52, July 2006, pp 3325-3329.
-
Slides for talk at
the coding theory session of ACA 2007.
-
White paper on NSF's CAS funding
(pdf,
latex)
with William Stein.
-
AMS Notices
opinion column on open source CAS funding
(pdf,
latex) with William Stein.
-
Draft of a survey paper on Duursma zeta
functions. Related SAGE code
for computing
Duursma zeta functions of extremal codes (using a fast method derived from
Duursma, Extremal weight enumerators and ultraspherical polynomials,
Discrete Mathematics, vol. 268, no. 1-3, pp. 103-127, July 2003).
-
Draft of a paper on
quadratic residue codes
and hyperelliptic curves, with SAGE code. Appeared in DMTCS.
-
A start to
a completely open source database of self-dual codes.
Lengths n<=20 are complete and there are some of length n=22.
up
David Joyner
Last updated: 4-1-2008