Results 51 to 60 of about 7,423,126 (192)

Relating $p$-adic eigenvalues and the local Smith normal form

, 2015
Conditions are established under which the $p$-adic valuations of the invariant factors (diagonal entries of the Smith form) of an integer matrix are equal to the $p$-adic valuations of the eigenvalues.
Elsheikh, Mustafa, Giesbrecht, Mark
core   +1 more source

Planetary Birkhoff normal forms

Journal of Modern Dynamics, 2011
Birkhoff normal forms for the (secular) planetary problem are investigated. Existence and uniqueness is discussed and it is shown that the classical Poincare variables and the ʀᴘs-variables (introduced in [6]), after a trivial lift, lead to the same Birkhoff normal form; as a corollary the Birkhoff normal form (in Poincare variables) is degenerate
Chierchia L., Pinzari G.
openaire   +4 more sources

This Is Not a Myeloproliferative Neoplasm…

Pediatric Blood &Cancer, EarlyView.
Stephanie Juané Kennedy
wiley   +1 more source

Normal form for travelling kinks in discrete Klein-Gordon lattices

, 2005
We study travelling kinks in the spatial discretizations of the nonlinear Klein--Gordon equation, which include the discrete $\phi^4$ lattice and the discrete sine--Gordon lattice.
Aigner, Barashenkov, Bender, Braun, Champneys, Dmitriev, Dmitry E. Pelinovsky, Eilbeck, Feckan, Flach, Gerard Iooss, Iooss, Iooss, Iooss, Iooss, Iooss, Kevrekidis, Lamb, Lombardi, Oxtoby, Pelinovsky, Savin, Speight, Speight, Speight, Tovbis, Tovbis, Vanderbauwhede   +27 more
core   +2 more sources

Linearization of hyperbolic resonant fixed points of diffeomorphisms with related Gevrey estimates in the planar case

Electronic Journal of Differential Equations, 2017
We show that any germ of smooth hyperbolic diffeomophism at a fixed point is conjugate to its linear part, using a transformation with a Mourtada type functions, which (roughly) means that it may contain terms like $x \log |x|$.
Patrick Bonckaert, Vincent Naudot
doaj  

A Kind of Forest Disease and Pest Infection Model with Time Delay

Journal of Harbin University of Science and Technology
Controlling forest diseases and insect pests is beneficial to increase forest carbon sink. It is of great significance to realize China ′s“ double carbon ”strategy.
FEI Xingyan, DING Yuting
doaj   +1 more source

Asymmetric Interaction of a Pair FitzHugh–Nagumo Oscillators

Моделирование и анализ информационных систем, 2014
A pair of diffusion connected FitzHugh–Nagumo oscillators with an asymmetric interaction are considered. The problem is investigated in the close to critical case, where the matrix of the linear part of the system has a pair of purely imaginary ...
E. A. Marushkina
doaj   +1 more source

Local Dynamics of an Equation with Large Exponential Distributed Delay

Моделирование и анализ информационных систем, 2011
We study properties of local dynamics of a differential equation with exponentially distributed delay. In critical cases we built special evolutionary equations.
I. S. Kashchenko
doaj  

Local Dynamics of a Second Order Equation with Large Exponentially Distributed Delay and Considerable Friction

Моделирование и анализ информационных систем, 2015
We study local dynamics of a nonlinear second order differential equation with a large exponentially distributed delay in the vicinity of the zero solution under the condition γ>√ 2. The parameter γ can be interpreted as a friction coefficient.
D. V. Glazkov
doaj   +1 more source

Normal forms for symplectic matrices [PDF]

Portugaliae Mathematica, 2014
We give a self contained and elementary description of normal forms for symplectic matrices, based on geometrical considerations. The normal forms in question are expressed in terms of elementary Jordan matrices and integers with values in \{ -1,0,1\}
openaire   +3 more sources