Geodesic

Volume 20 (1986) no. 4

Sommaire

Smooth equivalence of germs of vector fields with a single zero eigenvalue or a pair of purely imaginary eigenvalues
p. 1-8
Geodesic flows on the two-dimensional torus and phase transitions ``commensurability-noncommensurability''
p. 9-16
Quasiresonances in the problem of forced vibrations of a thin elastic shell interacting with a liquid
p. 17-28
Dilatation and the asymptotics of the eigenvalues of spectral problems with singularities
p. 29-34
Hamiltonian structure of the Kadomtsev--Petviashvili--II equation in the class of decreasing Cauchy data
p. 35-45
Unitary representations of the group $SO_0(\infty,\infty)$ as limits of unitary representations of the groups $SO_0(n,\infty)$ as $n\to\infty$
p. 46-57
Contractibility of the full general linear group of the $l_2(A)$
p. 58-64
Currents on Lie groups with nonholonomic connection and integrable nonhamiltonian systems
p. 65-66
Integration on supermanifolds and Radon supertransformations
p. 67-69
A sufficient condition for the continuity of the spectrum of a discrete Schr\"odinger operator
p. 70-71
Elements of formal Lie theory and the Poincar\'e--Birkhoff--Witt theorem for generalized shift operators
p. 72-73
A Problem of S. Banach (Problem 106 from the ``Scottish Book'')
p. 74-75
Finiteness of the discrete spectrum of the perturbed Wiener--Hopf operator
p. 76-78
K\"ahler geometry of the infinite-dimensional homogeneous manifold $M=\operatorname{Diff}_+(S^1)/\operatorname{Rot}(S^1)$
p. 79-80
Spectral properties of the Cauchy--Poisson problem and the local asymptotic behavior of waves
p. 81-82
Existence and uniqueness of local solutions of functional equations
p. 83-84
Spectra of $X^*$-algebras of pseudodifferential operators with multidimensional discontinuities in symbols
p. 85-86
Connection between the rigid isotopy class of a fifth-order nonsingular curve in $\mathbb{R}P^2$ and its disposition with respect to a line
p. 87-88
The Gel'fand--Dikii Lie Algebras and the Virasoro algebra
p. 89-90
Integrable $G$-invariant Hamiltonian systems and homogeneous spaces with simple spectrum
p. 91-92
Separation of multiple points of spectrum in the reduction $\mathrm{sp}(2n)\downarrow\mathrm{sp}(2n-2)$
p. 93-95