Some properties of global solution of scalar Riccati equation are studied. On the basis of these properties using the Whiburn's and Leighton - Nehary's theorems some oscillatory and criteria are proved for second order linear systems of ordinary differential equations.
Oscillation, suboscillation and nonoscillation criteria for linear systems of ordinary differential equations
Oscillation criteria for extended linear matrix Hamiltonian systems
On the oscillation of linear matrix Hamiltonian systems
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