Dr. Axel Kohnert

new webpage: algorithm.uni-bayreuth.de

Universität Bayreuth
Lehrstuhl Mathematik II
95440 Bayreuth
Germany
Room: 736 - NW2 - Mathematik
Phone: +49 (921) 55 3382
Fax: +49 (921) 55 3385
email: kohnert (at) uni-bayreuth.de (please change the mailto-url by hand)

publications/talks

2008:

Construction of codes for cryptographic purposes using groups of automorphisms (talk at NATO conference New Challenges in Digital Communications in Vlora (Albania) 6.5.2008) (pdf)
Sets of Type (d₁,d₂) in projective Hjelmslev planes over Galois Rings to appear in the proceedings of Special Semester on Groebner Bases - Algebraic Combinatorics in Linz (pdf)

2007:

Construction of Binary and Ternary Self-Orthogonal Linear Codes (joint paper with Alfred Wassermann) (pdf) to appear in Discrete Applied Math.
Construction of Linear Codes with Prescribed Primal and Dual Minimum Distance (talk at Kolloquium der Kombinatorik in Magdeburg 17.11.2007) (pdf)
Integral Pointsets over Z_n^m (joint paper with Sascha Kurz) (pdf) to appear in Discrete Applied Math.
Constructing Integral Pointsets in Z_n^m (talk at the Bulgarian Academy of Sciences in Sofia (Bulgaria) 08.10.2007) (pdf)
Symmetric Functions in MAGMA (talk at AXIOM workshop at RISC (Austria) 15.06.2007) (pdf)
(l,s)-Extension of Linear Codes , to appear in Discrete Math. (pdf)
Constructing Two-weight Codes with Prescribed Groups of Automorphisms (updated version) (pdf) appeared in Discrete Applied Math. (link)
New arcs in projective Hjelmslev planes over Galois rings (joint paper with Michael Kiermaier) appeared in the proceedings of conference on optimal codes and related topics Balchik Bulgaria 2007 (pdf)

2006:

Error-Correcting Linear Codes, joint book with Anton Betten, Michael Braun, Harald Fripertinger, Adalbert Kerber and Alfred Wassermann, 796p, Springer 2006.

Number of different degree sequences of a graph with no isolated vertices (talk at Kolloquium der Kombinatorik in Magdeburg 17.11.2006) (pdf)

Update on the Extension of Good Linear Codes(pdf), appeared in Electronic Notes in Discrete Mathematics

Extension of Good Linear Codes(talk at Combinatorics 2006 in Ischia) (pdf)

Two-Weight Codes with prescribed symmetries(poster at Special Semester on Groebner Bases - Algebraic Combinatorics in Linz) (pdf)

2005:

Construction of Two-Weight Codes (talk at 6. Symposium on Algebra and Computation (AC2005) in Tokyo) (pdf)
A Note on Erdös-Diophantine Graphs and Diophantine Carpets (joint paper with Sascha Kurz), appeared in Mathematica Balkanica, New Series Vol 21 (2007) 1-5 (pdf)
Construction of (sometimes) optimal codes (talk at ALCOMA05 in Thurnau) (pdf)
Construction of (sometimes) optimal codes (joint paper with Alfred Wassermann and Michael Braun) (pdf) appeared in proceedings of ALCOMA05
Construction of linear codes with prescribed minimum distance (joint paper with Alfred Wassermann and Michael Braun) Proceedings of conference on optimal codes Pamporovo Bulgaria 2005 (pdf)