Geodesic

Tome 29 (1993) no. 10

Sommaire

On the Aǐzerman problem for third-order time-dependent systems
p. 1659-1668
Topological classification of a quadratic system with a four-fold singular point
p. 1669-1674
Rational solutions of algebraic differential equations
p. 1675-1683
A criterion for the linearizability of the Riccati matrix differential equation and some properties of its solutions
p. 1684-1688
On the linear systems $L^pS$ with summable perturbations
p. 1689-1698
Linear systems of differential equations that are regular on $\mathbf R$
p. 1699-1704
On the boundedness of trajectories of time-dependent phase systems
p. 1705-1711
Approximate groups of transformations
p. 1712-1732
Transformation groups with a function parameter
p. 1733-1738
Seven notes on group analysis
p. 1739-1750
The Lie–Bäcklund group of the equations of nonlinear geometric optics
p. 1751-1764
On the structure of variational equations with symmetric operator $d/dt$
p. 1765-1771
Group classification and invariant solutions of nonlinear polyharmonic equations
p. 1772-1781
Higher integrals and symmetries of semi-Hamiltonian systems
p. 1782-1795
Weak invariants of local groups of transformations
p. 1796-1803
Group analysis of the Vlasov kinetic equation. I
p. 1804-1817
On the number of negative eigenvalues of the Schrödinger operator
p. 1818-1821
Inverse mean value theorem for $i$th order associated functions of the Laplace operator
p. 1822-1824
Group analysis of equations of thermal self-interaction of laser radiation in a moving medium
p. 1825-1828
On the Noethericity of a discrete convolution-type equation with almost stabilizing multipliers
p. 1829-1831
The Tricomi problem for the Lavrent'ev–Bitsadze system in a domain of a special form
p. 1832-1833
Sergeǐ Aleksandrovich Lomov (obituary)
p. 1834-1835