Hamiltonian structure of pi hierarchy.
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Takasaki, Kanehisa (2007)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Adler, M., van Moerbeke, P. (2001)
Annals of Mathematics. Second Series
Li-Peng Xiao (2015)
Annales Polonici Mathematici
The aim of this paper is to consider the following three problems:i (1) for a given uniformly q-separated sequence satisfying certain conditions, find a coefficient function A(z) analytic in the unit disc such that f”’ + A(z)f = 0 possesses a solution having zeros precisely at the points of this sequence; (2) find necessary and sufficient conditions for the differential equation (*) in the unit disc to be Blaschke-oscillatory; (3) find sufficient conditions on the analytic coefficients of the...
Dominique Cerveau, Alcides Lins Neto (1991)
Annales de l'institut Fourier
We give estimations for the degree of separatrices of algebraic foliations in .
Marco Brunella, Paulo Sad (1995)
Bulletin de la Société Mathématique de France
van Brunt, Bruce, Marshall, Jonathan C. (2005)
Electronic Journal of Differential Equations (EJDE) [electronic only]
Susumu Tanabé (2000)
Annales Polonici Mathematici
We give an algebraic description of (wave) fronts that appear in strictly hyperbolic Cauchy problems. A concrete form of a defining function of the wave front issued from the initial algebraic variety is obtained with the aid of Gauss-Manin systems satisfied by Leray's residues.
J.P. Jouanolou (1978)
Mathematische Annalen
Paul-Georg Becker, Walter Bergweiler (1995)
Mathematische Annalen
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