Oscillating and Proper Solutions of Singular Quasi-Linear Differential EquationsWe study the behaviour of solutions of quasi-linear 
differential equations of the second order
 The estimate of accuracy of the rational approximation of the monodromy operator for periodic solutions of nonlinear delay-
differential equations. In the case the period of the solution
 Разрешимость нечетких и интервальных уравненийMany calculating problems conditioned by indeterminacy make 
equations necessary to be solved
 Hyperbolic Systems with Multiple Characteristics and Some Applications conditions of nonstandard form. For a 
similar situation in the case ofordinary 
differential equations, one
 Analytical properties of solutions to a system of nonlinear partial  differential equationsCertain analytical properties of self-
similar solutions to a system of N partial 
differential