Graphical labs
Time-stepping simulations at teaching resolution. Diagnostics (E, P, ‖ψ‖², Onsager T_c, perihelion advance) stay on screen. Not CFD.
Featured
Orbital mechanics
Two-body Kepler vs Verlet trail
Schwarzschild orbits
Timelike geodesic + precession
Schrödinger packet
Crank–Nicolson TDSE
Ising model
2D Metropolis, Onsager T_c
Also in the lab
Same player, same conservation checks — demos, not the homepage.