Canonical systems whose Weyl coefficients have regularly varying asymptotics

Matthias Langer, Raphael Pruckner, Harald Woracek

For a two-dimensional canonical system $y^{\prime }(t)=zJH(t)y(t)$ on an interval $(0,L)$ with $0<L\le \infty$ whose Hamiltonian $H$ is a.e.\ positive semidefinite, denote by $q_H$ its Weyl…