Joel Holder

Math, coding, philosophy, and other things that interest me

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Inquiry and lab

Joel Holder

Recreational Learning & Discovery

Geometry Math Artificial Intelligence

This site is a rolling subset of my momentary interests. Here you'll find exploratory writing and interesting ideas turned into working things: software, simulations, and small instruments for thinking.

Current direction Learning in public, building for fun, and keeping the lab door open.

Selected work

Projects and experiments

Loose Leaf

Recent writing

  1. A Tiny Proof From First Principles
  2. Automata Arcade Is Becoming an Instrument
  3. Automata Arcade: Building a Playable Lab for Conway’s Game of Life
  4. Evo Lumen Life, creating a living ecosystem in the browser
  5. Wrapping C and C++ APIs in Python

Browse the archive

Writing Loose Leaf Technical notes, philosophy, experiments, and recovered posts from the old archive. Builds Projects Automata Arcade, Evo Lumen Life, and other working sketches. Context About A small map of what this site is for and where the experiments point.