Sdcb.Arithmetic × Chaos

Same start, same RK4 — each trajectory only rounds to a different number of bits. Watch them defect one by one: every extra bit buys a little more predictable future. Real lanes are integrated by C# across several WebAssembly workers.

Thousands of particles start inside a ball of radius ε; watch the butterfly effect spread them over the whole attractor. Switch to Real: particles 10⁻⁴⁰ apart are literally the same number in double.

The Pythagorean three-body problem: masses 3, 4 and 5 start at rest, and after a string of close encounters one star is flung out. Do double and Real fling it the same way? The figure-eight choreography is the stable control group.