Hilbert's sixth problem deals with the middle ground between atoms and quanta, and bulk properties of continuous fluid https://en.wikipedia.org/wiki/Hilbert%27s

Hilbert's sixth problem deals with the middle ground between atoms and quanta, and bulk properties of continuous fluid https://en.wikipedia.org/wiki/Hilbert%27s_sixth_problem https://en.wikipedia.org/wiki/Hilbert%27s_sixth_problem