The Navier Stokes equation isn't just a continuous limit of what's actually made of atoms, it also isn't relativistically invariant, meaning it's not compatible with Einstein's theories. It's a limiting case that works in many cases, but not fundamental. https://x.com/Plinz/status/2097584693386309805?s=20

Joscha Bach

@plinz · Twitter · 2026-09-09 07:15 UTC

Btw the Navier Stokes problem comes down to: if we lived in a truly continuous universe, fluids might sometimes explode. It’s an issue for the universe of classical mathematics, but does not apply to the computational universe we are in.