Portfolio and lab
Joel Holder
Recreational Learning & Discovery
Geometry
Math
Artificial Intelligence
This site is a rolling sample of my momentary interests. Here you'll find writings and examples of abstract ideas turned into working things: software, simulations, and small instruments for thinking.
Current direction
Learning in public, building with taste, and keeping the lab door open.
Selected work
Projects and experiments
Cellular automata
Automata Arcade
A playable workbench for composing, inspecting, and mutating emergent systems.
Artificial life
Evo Lumen Life
A browser ecosystem experiment with agents, energy, and evolving behavior.
Pure math
First principles of proof
A tiny proof showing how associativity and commutativity make algebra move.
Loose Leaf