Progress on the Navier-Stokes Problem

Ninety years of attacks on the regularity question, and where to go deeper The state of play Since the 1930s, mathematicians have attacked the problem from many angles, from energy estimates and geometry to probability and computer-assisted analysis. The full 3D existence-and-smoothness question remains completely, stubbornly open. But here's what people miss: we've learned an enormous amount from ninety years of failed attacks, and the collective picture is far richer than a simple "unsolved" l