Results 251 to 260 of about 235,061 (287)

Cross-sectional and longitudinal associations between circadian alignment and stroke in US adults. [PDF]

open access: yesiScience
Li B   +10 more
europepmc   +1 more source

Modest protection from vaccination against influenza A(H3N2) subclade K, Beijing, China, 2025/26 season. [PDF]

open access: yesEuro Surveill
Shen Y   +21 more
europepmc   +1 more source

CLASSIFICATIONS OF TWO-DIMENTIONAL HOMOGENEOUS CUBIC DIFFERENTIAL EQUATION SYSTEMS I

open access: yesCLASSIFICATIONS OF TWO-DIMENTIONAL HOMOGENEOUS CUBIC DIFFERENTIAL EQUATION SYSTEMS I
openaire  

Symmetric centers on planar cubic differential systems

Nonlinear Analysis, 2020
The authors of this paper investigate the simultaneous existence of centers in symmetric planar polynomial differential systems. In particular, they present necessary and sufficient conditions for the existence of a bi-center of four families for real cubic symmetric systems and obtain the conditions for the isochronicity of such bi-centers.
Maša Dukarić   +2 more
openaire   +2 more sources

Local stability of cubic differential systems

ACM Communications in Computer Algebra, 2015
Using Einstein’s notation [4]), the polynomial differential systems of finite dimension n and of degree at most k with coefficients in a field k of characteristic zero can be written as dx dt = a + ajα1x α1 + ajα1α2x 1x2 + ajα1···αrx α1 · · · xr (1) where j, α1, αr ∈ {1, . . . , n}, 1 ≤ r ≤ k, and for j = 1, . . . , n and for 2 ≤ r ≤ k, the tensor ajα1·
Dahira Dali, Jugurta Mahrez
openaire   +1 more source

Differential-flow-induced instability in a cubic autocatalator system

Journal of Engineering Mathematics, 1998
The formation of spatio-temporal stable patterns is considered for a reaction-diffusion-convection system based upon the cubic autocatalator, \(A+2B\to 3B\), \(B\to C\), with the reactant \(A\) being replenished by the slow decay of some precursor \(P\) via the simple step \(P\to A\).
Satnoianu, R. A.   +2 more
openaire   +2 more sources

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