My name is Edi Weitz, and I'm working as a professor for mathematics and computer science at the Hamburg University of Applied Sciences. Im also still available (for small to medium-sized tasks) as a free-lance consultant and application developer, specializing in Common Lisp. Email me (edi(at)weitz(dot)de or edi(at)agharta(dot)de) for address and phone numbers.

• My curriculum vitae (in German) - in case you want to hire me.
• Impressum (Imprint).
• Photography:
  • Almost... - my little photo "blog".
  • Or have a look at my photos on Flickr (or via Flickriver if you prefer).
  • The digital camera money can't buy. (Outdated!)
  • Photographers featured in the discontinued Leica World magazine.
• Music:
  • marcusmiller.com, the website of one of the best jazz bassists on earth which I created in 1996 and then maintained for more than 15 years.
  • ARF - The Zappa bibliography.
    (I contributed some information a couple of years ago.)
  • Information Is Not Knowledge.
    (An incredible amount of information. And for some reason I forgot I'm also mentioned as a contributor.)
  • The Hifidelio music server.
• Nerd stuff:
  • Common Lisp:
    • Code available on this server:
      • CAPI-OVERVIEW - A graphical overview of (some) CAPI classes.    [0.1.6 / 2006-10-18]
      • CHUNGA - Portable chunked streams for Common Lisp.    [1.1.5 / 2013-03-21]
      • CL-DONGLE - A Lisp interface to SG-Lock dongles.    [0.1.2 / 2008-05-01]
      • CL-FAD - A portable pathname library for Common Lisp.    [0.7.2 / 2013-07-03]
      • CL-GD - Use the GD Graphics library from Common Lisp.    [0.6.0 / 2012-05-28]
      • CL-INTERPOL - String interpolation for Common Lisp.    [0.2.1 / 2008-07-25]
      • CL-PPCRE - Portable Perl-compatible regular expressions for Common Lisp.    [2.0.7 / 2014-01-23]
      • CL-UNICODE - A portable Unicode library for Common Lisp.    [0.1.4 / 2012-05-29]
      • CL-WBXML - A WBXML parser for Common Lisp.    [0.2.4 / 2006-07-25]
      • CL-WEBDAV - A WebDAV server written in Common Lisp.    [0.2.1 / 2014-01-12]
      • CL-WHO - Yet another Lisp markup language.    [1.1.3 / 2013-11-16]
      • DOCUMENTATION-TEMPLATE - Prepare HTML documentation for Common Lisp libraries.    [0.4.3 / 2013-01-11]
      • Drakma - A Common Lisp HTTP client.    [1.3.9 / 2014-05-01]
      • FLEXI-STREAMS - Flexible bivalent streams for Common Lisp.    [1.0.13 / 2014-05-18]
      • FM-PLUGIN-TOOLS - A toolkit for FileMaker plug-in development in Common Lisp.    [0.2.9 / 2010-07-22]
      • HTML-EXTRACT - Extract plain text from HTML.    [0.1.0 / 2005-09-23]
      • HTML-TEMPLATE - Use HTML templates from Common Lisp.    [0.9.1 / 2007-11-16]
      • Hunchentoot - The Common Lisp web server formerly known as TBNL.    [1.2.27 / 2014-05-18]
      • LW-ADD-ONS - Some additions to the LispWorks IDE.    [0.9.0 / 2012-08-11]
      • LW-DOC - A permuted index for the LispWorks documentation.    [0.3.4 / 2012-05-05]
      • LW-WIN - Some Win32-specific functions for LispWorks.    [0.1.0 / 2008-04-28]
      • MIDGETS - A collection of CAPI widgets and utilties.    [0.6.2 / 2013-08-23]
      • ODD-STREAMS - Lisp binary streams with "odd" byte sizes.    [0.1.2 / 2013-01-11]
      • RDNZL - A .NET layer for Common Lisp.    [0.13.3 / 2010-05-18]
      • REGEX-PLUGIN - The source code for RegexPlugIn.    [0.2.1 / 2008-03-27]
      • STARTER-PACK - My personal Common Lisp "newbie" guide.    [0.6.2 / 2011-02-11]
      • TBNL - A toolkit for dynamic Lisp websites.    [0.11.4 / 2006-10-10]
      • URL-REWRITE - Rewrite (X)HTML attributes with Common Lisp.    [0.1.1 / 2006-08-28]
      ...and how to send patches.
    • Tutorials and such:
      • Packages, systems, modules, libraries - WTF?
      • The Power of Lisp Macros - a talk I gave for freiheit.com.
      • Enabling "foreign" callbacks into the LispWorks IDE.
      • A tutorial for ASDF-INSTALL.
      • Using ASDF with Corman Lisp.
      • The Common Lisp Cookbook.
      • Command line editing and auto completion with CMUCL, SBCL, or AllegroCL
      • Using the CLHS with Konqueror's "Enhanced Browsing".
    • Other:
      • European Common Lisp Meeting 2013 in Madrid.
      • Vsevolod Dyomkin did an interview with me in March 2012.
      • European Common Lisp Meeting 2011 in Amsterdam.
      • European Common Lisp Meeting 2009 in Hamburg.
      • Lisp in the Real World[TM] (slides from my talk at the European Lisp Workshop 2009 in Genoa)
      • European Common Lisp Meeting 2008 in Amsterdam.
      • My ILC07 rants.
      • European Common Lisp Meeting 2006 in Hamburg.
      • European Common Lisp Meeting 2005 in Amsterdam.
      • A nice Lisp logo by Manfred Spiller.
      • The Regex Coach - interactive regular expressions.
      • A Mandelbrot set explorer.
      • Lindenmayer systems.
      • A Turing machine.
      • Towers of Hanoi.
      • Ant colony optimization.
      • Gauss curve creator.
      • A small and simple peak meter for microphones.
      • CL-IPC - Unix IPC calls for Common Lisp.
    • More or less obsolete:
      • Who owns the fish?
        A Common Lisp solution to "Einstein's Riddle" (also known as the "Zebra Problem").
      • A modified version of Erik Naggum's CLHS lookup facility (part of ILISP) to allow for newer local versions of the HyperSpec.
        (Submitted to the ILISP maintainers and now a part of version 5.12.0.)
      • FFI code for CMUCL to compress a string to an array of bytes, using the zlib compression library.
        (This file was originally written for and distributed with Marc Battyani's CL-PDF.)
      • A small patch to ignore mouse buttons other than the first three in Garnet.
  • Making Windows Usable for Old Linux Farts
  • Apache modules (written in C):
    • mod_suffix - grant access to files on the webserver based on their suffix.
    • mod_header_modify - modify, add or remove incoming http headers.
  • TZ, an Oracle package to convert between timezones.
  • My solution (in OCaml) to the add-a-gram problem.
  • Installing Linux on a Sony Vaio Z505SX notebook, my personal experiences (slightly out-dated) that will hopefully be useful to other people.
  • My old PDP-11 emulator
• Mathematics:
  • Without Words... (and see also here and here)
  • Goodstein sequences
  • Sums of cubes
  • Sieve of Eratosthenes
  • Introduction to Cardinal Arithmetic, a book that was written jointly by my supervisor ("Doktorvater") Prof. Dr. Karsten Steffens, my former colleague Dr. Michael Holz, and me.
  • Untersuchungen über die Grundlagen der pcf-Theorie von Saharon Shelah (my dissertation, 1996)
  • Anwendungen transfiniter Methoden in der Graphentheorie (my diploma thesis, 1992)
  • My Erdös number is 3.
• Seminars, articles, and presentations (in German):
  • Kaisers Kleider 2.0 - an article about the "Web 2.0" written for punktum from September 2007.
  • Two seminars that I co-hosted (together with Jürgen Garbers) at the University of applied sciences of Hamburg in 1999 and 2000:
    • Die Internet-Revolution? Medien, Ökonomie, Gesellschaft.
    • Linux und der Prozeß gegen Microsoft - Macht und Ökonomie in der Software-Industrie.
  • "Das Medium ist die Botschaft", a presentation by Horst Berger and me, held at a Greenpeace conference in Hamburg, November 2000.
  • "Cyber Activism", another presentation by me, held at a Greenpeace seminar in Camp Reinsehlen, May 2001.
• Heike Stephan (my wife - who is also on Facebook)
• My Amazon Wish List.

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