On a canonical two-dimensional space of continuous functions
On a certain result of J. D. Keckic.
On a certain transformation of the solution set of two linear second order differential equations
On a codimension 3 bifurcation of plane vector fields with symmetry
On a distribution of zeros of solutions of a fourth-order iterated linear differential equation
On a reduction of nonlinear ordinary differential equations at an irregular type singularity
On a structure of the intersection of the set of dispersions of two second-order linear differential equations
On a transformation of solutions of the differential equation with a complex coefficient of a real variable
On algebraic properties of dispersions of the 3rd and 4th kind of the differential equation
On an application of the generalized Floquet theory to the transformation of the equation into its associated equation
On certain properties of linear iterative equations
An expression for the coefficients of a linear iterative equation in terms of the parameters of the source equation is given both for equations in standard form and for equations in reduced normal form. The operator that generates an iterative equation of a general order in reduced normal form is also obtained and some other properties of iterative equations are established. An expression for the parameters of the source equation of the transformed equation under equivalence transformations is obtained,...
On computer-aided solving differential equations and stability study of markets.
On differential equations in normal form.
On global transformations of functional-differential equations of the first order
The paper describes the general form of functional-differential equations of the first order with delays which allows nontrivial global transformations consisting of a change of the independent variable and of a nonvanishing factor. A functional equation for is solved on and a method of proof by J. Aczél is applied.
On global transformations of ordinary differential equations of the second order
The paper describes the general form of an ordinary differential equation of the second order which allows a nontrivial global transformation consisting of the change of the independent variable and of a nonvanishing factor. A result given by J. Aczél is generalized. A functional equation of the form is solved on for ,
On Halphen and Laguerre-Forsyth canonical forms of linear differential equations
On Lyapunov transformations of linear systems of implicit differential equations
On perturbed iterative linear differential equations of order .
On phases of accompanying spaces to a linear two-dimensional space of functions with a continuous first derivative
On some properties of functions relative to the classes of certain factor spaces