Andries E. Brouwer (original) (raw)
prof.dr. A.E. Brouwer Dept. of Math. Techn. Univ. Eindhoven P.O. Box 513 5600MB Eindhoven Netherlands
email: aeb@cwi.nl
people at win.tue.nl/ owinfo/ library/ eiψ/ eidma/ diamant
Math
List of(mathematical) publicationsand available preprints.
Algebraic graph theory
A feeble attempt to make the files withAdditions and Correctionsto `Distance-Regular Graphs' by Brouwer, Cohen and Neumaier (Springer, 1989) available. The source is some troff dialect, with most formatting commands removed. One further correction (PDF). Yet another.
Infoon email server (that stopped working mid 2004) with information on distance-regular graphs.
Machine-readable intersection arraysfor distance-regular graphs.
Spectra of graphs, extended course notes.
A table of parameters of strongly regular graphs.
A table of parameters of directed strongly regular graphs.
A slowly growing collectionof graph descriptions.
All small (0,2)-graphs. And small integral trees. And the known cages.
Counts on the number of cospectral graphs on at most 12 vertices.
Random stuffinspired by Ph.D. / M.Sc. theses of people nearby: Man, Erik, Tim, Ralf, Sander, Jochem ...
Computational complexity
Finding the maximum cocliquein a sparse graph.Two examples.
Coding theory
Server for bounds on the minimum distance of _q_-ary linear codes, _q_=2,3,4,5,7,8,9. Several other interfaces exist. There areinstructions on how to use the email server (that stopped working mid 2004).Plots of the rates of the codes in these tables.
A small table of bounds for binary codes.
A small table of bounds for ternary codes.
Tables for mixed binary/ternary codes.
A small table of bounds for quaternary codes.
A small table of bounds for 5-ary codes.
Bounds on constant weight codes.
Apple-vs-Samsung: a descriptionof the TFCI code used, and thejudgmentof the The Hague court (Dutch).
Matrices over finite fields
Counting symmetric nilpotent matrices.
Classical invariant theory
Data on invariants of binary forms.
Wetenschap
Wetenschap (Dutch).
Eindige meetkunde
Dictaat van Seidel (Dutch).
Computer algebra
Some preliminary lecture notesfor a course Computers and Mathematics (Dutch). Includes some ancient PDP8 stuff.
Unix port of the COCO computer algebra system for computations with permutation groups.
Algebra and Geometry
Course 2WF02 / 2WF05. Contact details.
Algebraic Topology
Some preliminary lecture notes.
Cardinal and Ordinal Numbers
Very brief introduction to cardinals and ordinals.
Lattices
DAM course notes.
Prijsvraag | Contest
Eindejaars Prijsvraag 2000 | End-of-Year Contest 2000. And a discussionof the problem.
Eindejaars Prijsvraag 2001 | End-of-Year Contest 2001.
Eindejaars Prijsvraag 2002 | End-of-Year Contest 2002.
Games and Puzzles
An applet to play a Japanese puzzleand a somewhat larger version. (In Japan this game is called "Paint by Numbers". The very good site of Mitsuhiro Kajitani doesn't seem to exist anymore.)
Remarks on how to solve Sudoku puzzles.
An applet to play a puzzle that is sometimes calledButton Madness, and some numerical info. Also Lights Out!(Knuth's perfect parity patterns) with an extensivetableof periods.
The 0-person game of Sandpile, or Chip Firing.
The game of Chomp. And an applet.
And a NIM applet.
Who can construct a Benjamin Franklin magic square of order 12?
Go and Linux
Een Go stelling.
Some SGF utils, such assgftopng.
The Hikarunix Linux distribution.
Linux
Linux and other computer related information (such as a list of all known DOSpartition types, or the instruction set of the 8051 microprocessor).OpenMP, the easiest way to use a multi-CPU machine.Archives with early Linux stuff (kernels up to 2.2.20, libc2, libc4, libc5, etc.).
Security
Installation and security of ADSL and Alcatel Speed Touch ethernet modem.
The password algorithm.
How to decrypt the Dutch telephone CD-ROM, a story (Dutch) and programs (C)
John the Ripper, a password cracker.
Recht en samenleving
Een verzameling Nederlandse wetten. Het proces Stern vs. Brouwer.
Levenslang voor Lucia de Bvanwege foutieve kansberekening.
The Pirate Bay - meer foutieve kansberekening.
Wikileaks
Removed by TUE censorship - moved to xs4all.
The TUE was unhappy with the Wikileaks documents hosted here. They were dual-purpose: for general education and for specific exercises. If you need to access this material, trythis site. Funny, this TUE censorship.
COS and family
Church of Scientology (sic) information - removed in 1997 on request of the TUE (that avoids legal battles), added again Dec 2005 (after Karin Spaink and XS4ALL won all legal battles), removed again in Feb 2007 on request of COS lawyers. See also XS4ALL Newsand Karin Spaink's page with COS material.
Some stories about Landmark Forum.
Language and Typesetting
Use of verbatim mode with ArabTeX.Qur'an fragment in Kufic script.Earlier Kufic.
Special symbols in the Hebrew Bible.
Urdu double-eyed he.Malay (Jawi) alphabet
Pokorny's indoeuropean etymological dictionary.
Adams' Tocharian B dictionary.
Demiraj's Albanian inherited lexicon.
Digital versions of Brugmann's'Grundriß'.
Texts
People
Elsewhere
Petition against software patents. (The website seems to have died, but the issue is important as ever.) There is some progress.
Society
Guantánamo, not the worst of the worst, but the unluckiest of the unluckiest.
Don Knuth'sInfrequently Asked Questions.
Why it matters- If privacy disappears from the face of the Earth, mathematicians will be some of the primary culprits.
Math
Math Reviews(MathSciNet is available by subscription only).
The Electronic Journal of Combinatorics.
Guide to Available Mathematical Software.
Character sets and other standards
SCSI standard: T10, ATA standard: T13.
Character set information:Starling.ISO 2375 Character Set Registry. Indrek Hein's database.ISO 8859-* information. Unicode. ISO online.
Languages.The Ethnologue.
Games
Linux
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