Oscillatory properties of higher-order advance functional-differential equations (Q1873490)

Here, the functional-differential equation \[ u^{(n)}(t)= f(u)(t)\tag{1} \] is considered, where \(f: C(\mathbb{R}_+;\mathbb{R})\to L_{\text{loc}}(\mathbb{R}_+, \mathbb{R})\) is a continuous mapping. Oscillatory properties of proper solutions of equation (1) are studied.