2 problems

Consider initial conditions for the ABC flow in the non-KAM region. Principal-vortex conjecture. There exists an open set of positive measure of initial conditions such that $y$ (o…

Let $X(t)=(x(t),y(t),z(t))$ be a solution of the ABC flow with perturbation parameter $\tilde\epsilon>0$, and let $T>0$ be a period modulo a lattice translation in the $x$- and $y$…