Geodesic

Sommaire du Fascicule no. 1

On the distribution of zeros of solutions of some types of differential equation $y''=q(t)y$
p. 1-24
Oscillation of solutions of a non-linear delay differential equation of the fourth order
p. 25-29
The approximation of functions in the sense of Tchebychev. I
p. 31-51
Einige kombinatorische Identitäten
p. 53-66

Sommaire du Fascicule no. 2

An abstract model of linear differential transformations
p. 67-77
Bounds for solutions of the equation $[p(t)x']'+q(t)x=h(t,x,x')$
p. 79-84
Asymptotic properties of dispersions of the differential equations $y''=q(t)y$
p. 85-98
An oscillation criterion for third order linear differential equations
p. 99-104
Modular, distributive and simple intervals of the lattice of topologies
p. 105-114
Die algebraische Struktur der allgemeinen Kummerschen Transformationen
p. 115-121

Sommaire du Fascicule no. 3

Matrices of homomorphic mappings
p. 123-130
On the impossibility to construct diametrically critical graphs by extensions
p. 131-137
Некоторые колеблющиеся свойства решений нелинейного дифференциального уравнения вида $y'''+p(x)y''+q(x)f(y')+r(x)h(y)=0$
p. 139-149
Методы усреднения для одной двухточечной краевой задачи для систем интегро-дифференциальных уравнений
p. 151-168
Об одном варианте метода усреднения для систем интегро-дифференциальных уравнений стандартного типа
p. 169-173
Asymptotic behaviour of the system of two differential equations
p. 175-186

Sommaire du Fascicule no. 4

On zeros of solutions of the differential equation $(p(t)y' )' +f(t, y, y' )=0$
p. 187-192
Asymptotic behaviour of the equation $x''+p(t)x'+q(t)x=0$ with complex-valued coefficients
p. 193-204
On a coincidence of central dispersions of the first and second kind in connection with periodic solutions of the differential equation $y'=q(t)y$
p. 205-216
Projective and injective complete lattices
p. 217-239
Über Realisierungen geordneter Mengen
p. 241-245