Signal log — mathematics, physics, code
Interactive demos and long-form notes on the problems I could not stop thinking about: gravity trains, magic squares, balanced trees, and the occasional piece of scientific history.
16 articles 43 topics 2013-2026 archive
Blog
Drop atoms into a 3D workspace, bond them together, and watch the geometry arrange itself. Methane finds its tetrahedron, benzene flattens into a hexagon, and cyclohexane buckles into a chair — from two rules and no table of angles.
Blog
A search tree is only fast while it stays short, and there are surprisingly different ways to keep it that way: measure heights, colour nodes, roll dice, or give up on binary altogether. Add and delete values in all four and watch each one repair itself a step at a time.
Blog
Two rules, a handful of coloured dots, and a longest game so vast that with three colours nobody can write the answer down. Build sequences here and let the computer tell you the moment you break the rules.
Blog
A total eclipse is a cosmic coincidence: a moon that just barely covers the sun. This app lets you move through the Sun, Moon and Earth system and watch the geometry that decides which patch of the planet falls into shadow.
Blog
A lightweight, visual task board that runs entirely in the browser. Move work between columns, track what is in flight, and keep day-to-day planning low friction: no backend, no account, nothing to sync.
Blog
Balanced binary trees promise fast inserts, finds and deletes, and rotations are what keep the promise: they stop the tree from growing lopsided. Add and remove nodes here and watch each rotation play out one step at a time.