Estimates for the Weyl coefficient of a two-dimensional canonical system

Matthias Langer, Raphael Pruckner, Harald Woracek

For a two-dimensional canonical system $y^{\prime }(t)=zJH(t)y(t)$ on some interval $(a,b)$ whose Hamiltonian $H$ is a.e. positive semi-definite and which is regular at $a$ and in the limit…