ultrametric

    |a + b| ≤ max{|a|,|b|}
  

These are the odds and ends that don't belong on my professional page.

Professional page

For the things that do belong on my professional page.

Picture site

My family's life in photographs, since 1974.

ipe2tikz

An ipelet (plugin for Ipe) that exports readable TikZ code.

spalign

A LaTeX package for typesetting matrices with fewer keystrokes.

poporg

A small Emacs package that I maintain and mostly wrote.

popup-keys

Another Emacs package that I wrote and use all the time.

python-ebml

A Matroska file format parser I wrote.

Lever escapement

A translation of a 1910 paper by H. R. Playtner into more modern language.

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Wiki page for ultrametric

A math word that is close to my heart.