Interactive MathFlow simulations from Rivetmech — cream boards, orange & blue orbits, and the quiet geometry behind fasteners, curves, and chess.
Castling, en passant, and promotion as joint permutations on overlapping orbits — board and state graph kept in sync.
/chess/Clothoids, arcs, and cubic racing lines on Autodromo Nazionale Monza — κ(s) families with live F1 markers.
/monza/Pin & collar cutaway through insert, pull, swage, and lock — Matheorems-style orbits for the annular ring grooves.
/lockbolt/Collar swage via Poisson’s ratio and plastic incompressibility — strain plane, ν_eff, and groove-fill comparison.
/poisson/