论文信息 - Weighted means and oscillation conditions for second order matrix differential equations

Weighted means and oscillation conditions for second order matrix differential equations

On considere le systeme d'equations differentielles d'ordre 2 [P(t)y'(t)]'+Q(t)y(t)=0 pour t∈[0,∞), ou P et Q sont des matrices symetriques n×n reelles sur [0,∞) et y un vecteur colonne. On suppose que P(t) est definie positive pour tout t tel que P(t) −1 . On donne des conditions d'oscillations

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