Abstract
Kato, Ponce, Beale and Majda prove the existence and uniqueness of maximal solution of Euler and Navier–Stokes equations and some blow‐up criterion. In the periodic case, we establish that if the maximum time T* is finite, then the growth of ∥u(t)∥Hm is at least of the order of (T* − t)−2m / 5. Copyright © 2012 John Wiley & Sons, Ltd.