Geodesic
Oscillation Theorems for Perturbed Second Order Nonlinear Differential Equations with Damping
Serdica Mathematical Journal, Tome 23 (1997) no. 1, pp. 1-14 Cet article a éte moissonné depuis la source Bulgarian Digital Mathematics Library

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Some oscillation criteria for solutions of a general perturbed second order ordinary differential equation with damping (r(t)x′ (t))′ + h(t)f (x)x′ (t) + ψ(t, x) = H(t, x(t), x′ (t)) with alternating coefficients are given. The results obtained improve and extend some existing results in the literature.
Keywords: Oscillatory Solutions, Second Order Differential Equations 
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     author = {Elabbasy, E.},
     title = {Oscillation {Theorems} for {Perturbed} {Second} {Order} {Nonlinear} {Differential} {Equations} with {Damping}},
     journal = {Serdica Mathematical Journal},
     pages = {1--14},
     year = {1997},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_1997_23_1_a0/}
}
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Elabbasy, E. Oscillation Theorems for Perturbed Second Order Nonlinear Differential Equations with Damping. Serdica Mathematical Journal, Tome 23 (1997) no. 1, pp. 1-14. http://geodesic.mathdoc.fr/item/SMJ2_1997_23_1_a0/