Oscillation theorems for self-adjoint matrix Hamiltonian systems
By using generalized Riccati technique and linear positive weighted averages technique, some new oscillation criteria for selfadjoint matrix Hamiltonian systems \[ U'(x)=A(x)U(x)+B(x)V(x),\qquad V'(x)=C(x)U(x)-A^*(x)V(x), \] are obtained. The obtained results generalize and improve some earlier results.
scientific article; zbMATH DE number 1915662