This issuePrevious ArticleAsymptotic behavior of solutions of the mixed problem for semilinear hyperbolic equationsNext ArticleOn a unilateral reaction-diffusion system and a nonlocal evolution obstacle problem
Nonlinear functionals in oscillation theory of matrix differential systems
General oscillation criteria for second order two-term linear differential systems and,
as a consequence, a more general class of Hamiltonian systems with symmetric coefficients are
established using nonlinear functionals on a suitable matrix space.
This extends and unifies most known results dealing with oscillation criteria
using the particular maximum eigenvalue functional.