Homepage of Andreas Klein

Research

My research interests lie in Discrete Mathematics/Combinatorics and its application.

• Finite Geometry (partial ovoids, spreads, etc.)
• Cryptography (e.g. Visual Cryptography)
• Complexity Theory (parallel automata)
• Coding Theory (geometric constructions, convolutional codes, etc.)

Miscellaneous

Besides mathematics I like to play around with computes. For example this side makes heavy use of Cascading Style Sheets and the apache Multiviews Option. If you see a very bad presentation your browser has a wrong implementation of Cascading Style Sheet. Just turn CSS of or even better go and find a new and better browser.

If you read this your browser does not support CSS2 (Standard since 1998)! For optimal presentation you should use a newer browser like Mozilla, Firefox, Opera or Safari.

Please note that the English version of this page is under construction. So don't be surprised if some pages are available only in German.

Zur deutschen Version
Last modified at Monday, 21-Sep-2009 08:44:51 CEST

Navigation

• Home : Back to the Homepage of Andreas Klein
• Publications : All articles I have published so fare.
• Teaching : The lectures I have given in the last years.
  • Codierungstheorie WS2005
  • Kryptographie SS2005
  • Codierungstheorie WS2004
  • Seminar Geometrie WS2004 : Lehramt Grund-, Haupt-, Realschule
  • Kryptographie SS2004
  • Algebra II SS2004
  • Diskrete Mathematik II WS2003
  • Diskrete Mathematik I SS2003
  • Seminar Codierungstheorie und Kryptographie WS2002
  • Elementare Zahlentheorie WS2002
  • Diskrete Mathematik SS2002
  • Kryptographie SS2002
  • Einführung in die Programmierung WS2001
  • Computeralgebra SS2001
  • Algebra 1 WS2000
  • Programmierkurs Java WS2000
  • Programmierkurs C++ SS2000
  • Programmierkurs Perl WS1999
  • Programmierkurs C++ SS1999
  • Wissenschaftliche Grundlagen des Mathematischen Schulstoffs SS1998
• Mathematics : Even more mathematical links.
  • Visual Cryptography : Examples to Visual Kryptography, see also DMV Mitteilungen 1/2005
  • RC4 : An Attack against the RC4 stream chiffre, presented at the meeting of Fachgruppe Computeralgebra, Kassel 2005
  • Population Count : Conting 1 bits in an array.
  • RSA : Unsafe RSA intances
  • Galois extensions : Use this database to find polynomials with prescribe Galois group. The database was complied by J. Klüners and G. Malle, the Web interface is my work.
  • Contests : A list of mathematical contests for students.
• Computer : Programs, etc.
  • Debian Packages : A little Perl script that generates a Debian package from a Perl module.
  • CSS : Here I explain how I have constructed this side.
  • Literate Programming : Literate Programming allows the generation of documentation directly form the source code. Here is my own literate programming system.